64736205864 has 64 divisors (see below), whose sum is σ = 176594688000. Its totient is φ = 19612432320.

The previous prime is 64736205839. The next prime is 64736205871. The reversal of 64736205864 is 46850263746.

It is a happy 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, 1198267 + ... + 1251125.

It is an arithmetic number, because the mean of its divisors is an integer number (2759292000).

Almost surely, 2^64736205864 is an apocalyptic number.

It is an amenable number.

64736205864 is an abundant number, since it is smaller than the sum of its proper divisors (111858482136).

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

64736205864 is a wasteful number, since it uses less digits than its factorization.

64736205864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57518 (or 57514 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 51.

The spelling of 64736205864 in words is "sixty-four billion, seven hundred thirty-six million, two hundred five thousand, eight hundred sixty-four".