617932475988 has 12 divisors (see below), whose sum is σ = 1441842444000. Its totient is φ = 205977491992.

The previous prime is 617932475921. The next prime is 617932476067. The reversal of 617932475988 is 889574239716.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×617932475988² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25747186488 + ... + 25747186511.

It is an arithmetic number, because the mean of its divisors is an integer number (120153537000).

Almost surely, 2^617932475988 is an apocalyptic number.

It is an amenable number.

617932475988 is an abundant number, since it is smaller than the sum of its proper divisors (823909968012).

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

617932475988 is a wasteful number, since it uses less digits than its factorization.

617932475988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51494373006 (or 51494373004 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 69.

The spelling of 617932475988 in words is "six hundred seventeen billion, nine hundred thirty-two million, four hundred seventy-five thousand, nine hundred eighty-eight".