6555611556172 has 12 divisors (see below), whose sum is σ = 13111223112400. Its totient is φ = 2809547809776.

The previous prime is 6555611556157. The next prime is 6555611556191. The reversal of 6555611556172 is 2716551165556.

6555611556172 is an admirable number.

It is a super-2 number, since 2×6555611556172² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117064492047 + ... + 117064492102.

Almost surely, 2^{6555611556172} is an apocalyptic number.

It is an amenable number.

6555611556172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6555611556172 is a wasteful number, since it uses less digits than its factorization.

6555611556172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234128984160 (or 234128984158 counting only the distinct ones).

The product of its digits is 9450000, while the sum is 55.

The spelling of 6555611556172 in words is "six trillion, five hundred fifty-five billion, six hundred eleven million, five hundred fifty-six thousand, one hundred seventy-two".