18111269655 has 64 divisors (see below), whose sum is σ = 33705123840. Its totient is φ = 9215942400.

The previous prime is 18111269639. The next prime is 18111269681. The reversal of 18111269655 is 55696211181.

It is not a de Polignac number, because 18111269655 - 2⁴ = 18111269639 is a prime.

It is a super-2 number, since 2×18111269655² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18111269655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 266659 + ... + 327611.

It is an arithmetic number, because the mean of its divisors is an integer number (526642560).

Almost surely, 2^18111269655 is an apocalyptic number.

18111269655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18111269655 is a deficient number, since it is larger than the sum of its proper divisors (15593854185).

18111269655 is a wasteful number, since it uses less digits than its factorization.

18111269655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61069 (or 61063 counting only the distinct ones).

The product of its digits is 129600, while the sum is 45.

The spelling of 18111269655 in words is "eighteen billion, one hundred eleven million, two hundred sixty-nine thousand, six hundred fifty-five".