64870391994 has 16 divisors (see below), whose sum is σ = 130021007232. Its totient is φ = 21576760128.

The previous prime is 64870391977. The next prime is 64870392017. The reversal of 64870391994 is 49919307846.

64870391994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11672959 + ... + 11678514.

It is an arithmetic number, because the mean of its divisors is an integer number (8126312952).

Almost surely, 2^64870391994 is an apocalyptic number.

64870391994 is an abundant number, since it is smaller than the sum of its proper divisors (65150615238).

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

64870391994 is a wasteful number, since it uses less digits than its factorization.

64870391994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23351941.

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 64870391994 in words is "sixty-four billion, eight hundred seventy million, three hundred ninety-one thousand, nine hundred ninety-four".