64697875980 has 48 divisors (see below), whose sum is σ = 183857856000. Its totient is φ = 16995261888.

The previous prime is 64697875961. The next prime is 64697875993. The reversal of 64697875980 is 8957879646.

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

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, 8042980 + ... + 8051019.

It is an arithmetic number, because the mean of its divisors is an integer number (3830372000).

Almost surely, 2^64697875980 is an apocalyptic number.

64697875980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64697875980 is an abundant number, since it is smaller than the sum of its proper divisors (119159980020).

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

64697875980 is a wasteful number, since it uses less digits than its factorization.

64697875980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16094078 (or 16094076 counting only the distinct ones).

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

The spelling of 64697875980 in words is "sixty-four billion, six hundred ninety-seven million, eight hundred seventy-five thousand, nine hundred eighty".