18956555624168 has 128 divisors (see below), whose sum is σ = 41224495104000. Its totient is φ = 8117658024960.

The previous prime is 18956555624159. The next prime is 18956555624197. The reversal of 18956555624168 is 86142655565981.

It is a super-2 number, since 2×18956555624168² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4064393 + ... + 7377831.

It is an arithmetic number, because the mean of its divisors is an integer number (322066368000).

Almost surely, 2^{18956555624168} is an apocalyptic number.

It is an amenable number.

18956555624168 is an abundant number, since it is smaller than the sum of its proper divisors (22267939479832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18956555624168 is a wasteful number, since it uses less digits than its factorization.

18956555624168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313575 (or 3313571 counting only the distinct ones).

The product of its digits is 622080000, while the sum is 71.

The spelling of 18956555624168 in words is "eighteen trillion, nine hundred fifty-six billion, five hundred fifty-five million, six hundred twenty-four thousand, one hundred sixty-eight".