64707064880 has 20 divisors (see below), whose sum is σ = 150443926032. Its totient is φ = 25882825920.

The previous prime is 64707064859. The next prime is 64707064883. The reversal of 64707064880 is 8846070746.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (64707064883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404419076 + ... + 404419235.

Almost surely, 2^64707064880 is an apocalyptic number.

It is an amenable number.

64707064880 is an abundant number, since it is smaller than the sum of its proper divisors (85736861152).

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

64707064880 is a wasteful number, since it uses less digits than its factorization.

64707064880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808838324 (or 808838318 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 64707064880 in words is "sixty-four billion, seven hundred seven million, sixty-four thousand, eight hundred eighty".