17955557956 has 24 divisors (see below), whose sum is σ = 36675184896. Its totient is φ = 7531510080.

The previous prime is 17955557933. The next prime is 17955558041. The reversal of 17955557956 is 65975555971.

It is a super-2 number, since 2×17955557956² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6820705 + ... + 6823336.

It is an arithmetic number, because the mean of its divisors is an integer number (1528132704).

Almost surely, 2^17955557956 is an apocalyptic number.

It is an amenable number.

17955557956 is an abundant number, since it is smaller than the sum of its proper divisors (18719626940).

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

17955557956 is a wasteful number, since it uses less digits than its factorization.

17955557956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13644099 (or 13644097 counting only the distinct ones).

The product of its digits is 74418750, while the sum is 64.

The spelling of 17955557956 in words is "seventeen billion, nine hundred fifty-five million, five hundred fifty-seven thousand, nine hundred fifty-six".