64165512056 has 48 divisors (see below), whose sum is σ = 130105747800. Its totient is φ = 29629595072.

The previous prime is 64165512043. The next prime is 64165512109. The reversal of 64165512056 is 65021556146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138686 + ... + 384141.

Almost surely, 2^64165512056 is an apocalyptic number.

It is an amenable number.

64165512056 is an abundant number, since it is smaller than the sum of its proper divisors (65940235744).

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

64165512056 is a wasteful number, since it uses less digits than its factorization.

64165512056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522908 (or 522881 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 64165512056 in words is "sixty-four billion, one hundred sixty-five million, five hundred twelve thousand, fifty-six".