64985902872 has 64 divisors (see below), whose sum is σ = 178528060800. Its totient is φ = 19548944640.

The previous prime is 64985902847. The next prime is 64985902913. The reversal of 64985902872 is 27820958946.

64985902872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×64985902872³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862222 + ... + 934557.

It is an arithmetic number, because the mean of its divisors is an integer number (2789500950).

Almost surely, 2^64985902872 is an apocalyptic number.

It is an amenable number.

64985902872 is an abundant number, since it is smaller than the sum of its proper divisors (113542157928).

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

64985902872 is a wasteful number, since it uses less digits than its factorization.

64985902872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796936 (or 1796932 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 64985902872 in words is "sixty-four billion, nine hundred eighty-five million, nine hundred two thousand, eight hundred seventy-two".