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11111115555556 = 22472354612
BaseRepresentation
bin1010000110110000001000…
…0110001000001011100100
31110100012201202011202012221
42201230002012020023210
52424021031040234211
635344213115322124
72224515541625332
oct241540206101344
943305652152187
1011111115555556
1135a421a079465
1212b54aa150344
13627a09a8a0b3
142a5ad0986b52
1514405b6abc71
hexa1b021882e4

11111115555556 has 27 divisors (see below), whose sum is σ = 19867526613417. Its totient is φ = 5437201087440.

The previous prime is 11111115555523. The next prime is 11111115555581. The reversal of 11111115555556 is 65555551111111.

It is a happy number.

The square root of 11111115555556 is 3333334.

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., 4409437217956 + 6701678337600 = 2099866^2 + 2588760^2 .

It is a Duffinian number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 313315666 + ... + 313351126.

Almost surely, 211111115555556 is an apocalyptic number.

11111115555556 is the 3333334-th square number.

It is an amenable number.

11111115555556 is a deficient number, since it is larger than the sum of its proper divisors (8756411057861).

11111115555556 is an frugal number, since it uses more digits than its factorization.

11111115555556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71020 (or 35510 counting only the distinct ones).

The product of its digits is 93750, while the sum is 43.

Adding to 11111115555556 its reverse (65555551111111), we get a palindrome (76666666666667).

It can be divided in two parts, 1111111 and 5555556, that multiplied together give a palindrome (6172839382716).

The spelling of 11111115555556 in words is "eleven trillion, one hundred eleven billion, one hundred fifteen million, five hundred fifty-five thousand, five hundred fifty-six".

Divisors: 1 2 4 47 94 188 2209 4418 8836 35461 70922 141844 1666667 3333334 6666668 78333349 156666698 313333396 1257482521 2514965042 5029930084 59101678487 118203356974 236406713948 2777778888889 5555557777778 11111115555556