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11111108888889 = 32239246492
BaseRepresentation
bin1010000110110000000110…
…1100101100100100111001
31110100012201021122001021100
42201230001230230210321
52424021022333421024
635344212320402013
72224515431151102
oct241540154544471
943305637561240
1011111108888889
1135a4216335719
1212b54a7a76309
13627a08594819
142a5acdb2d3a9
1514405ace17c9
hexa1b01b2c939

11111108888889 has 27 divisors (see below), whose sum is σ = 16120280165743. Its totient is φ = 7374825929184.

The previous prime is 11111108888861. The next prime is 11111108888921. The reversal of 11111108888889 is 98888880111111.

The square root of 11111108888889 is 3333333.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10873394135289 + 237714753600 = 3297483^2 + 487560^2 .

It is not a de Polignac number, because 11111108888889 - 235 = 11076749150521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111108888849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2389997437 + ... + 2390002085.

Almost surely, 211111108888889 is an apocalyptic number.

11111108888889 is the 3333333-rd square number.

11111108888889 is the 1666667-th centered octagonal number.

It is an amenable number.

11111108888889 is a deficient number, since it is larger than the sum of its proper divisors (5009171276854).

11111108888889 is an frugal number, since it uses more digits than its factorization.

11111108888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9782 (or 4891 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 63.

It can be divided in two parts, 1111110 and 8888889, that added together give a palindrome (9999999).

The spelling of 11111108888889 in words is "eleven trillion, one hundred eleven billion, one hundred eight million, eight hundred eighty-eight thousand, eight hundred eighty-nine".

Divisors: 1 3 9 239 717 2151 4649 13947 41841 57121 171363 514089 1111111 3333333 9999999 21613201 64839603 194518809 265555529 796666587 2389999761 5165555039 15496665117 46489995351 1234567654321 3703702962963 11111108888889