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999997555311111 = 37283168264774577
BaseRepresentation
bin1110001101011111100001001…
…1000011111000001000000111
311212010200211111000001020011010
43203113320103003320020013
52022032424443124423421
613502452311313213303
7420430303432541610
oct34327702303701007
94763624430036133
10999997555311111
1126a6a26440aa6a5
12941a6285b61233
1333bca498722bb6
14138d21d5d42c07
157a92370899076
hex38d7e130f8207

999997555311111 has 16 divisors (see below), whose sum is σ = 1529190271364864. Its totient is φ = 569407997165184.

The previous prime is 999997555311017. The next prime is 999997555311173. The reversal of 999997555311111 is 111113555799999.

It is not a de Polignac number, because 999997555311111 - 245 = 964813183222279 is a prime.

It is a super-2 number, since 2×9999975553111112 (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999997555311611) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84132381346 + ... + 84132393231.

It is an arithmetic number, because the mean of its divisors is an integer number (95574391960304).

Almost surely, 2999997555311111 is an apocalyptic number.

999997555311111 is a deficient number, since it is larger than the sum of its proper divisors (529192716053753).

999997555311111 is a wasteful number, since it uses less digits than its factorization.

999997555311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168264774870.

The product of its digits is 155003625, while the sum is 75.

The spelling of 999997555311111 in words is "nine hundred ninety-nine trillion, nine hundred ninety-seven billion, five hundred fifty-five million, three hundred eleven thousand, one hundred eleven".

Divisors: 1 3 7 21 283 849 1981 5943 168264774577 504794323731 1177853422039 3533560266117 47618931205291 142856793615873 333332518437037 999997555311111