64381394375 has 10 divisors (see below), whose sum is σ = 80450991192. Its totient is φ = 51505115000.

The previous prime is 64381394369. The next prime is 64381394411. The reversal of 64381394375 is 57349318346.

It is a de Polignac number, because none of the positive numbers 2^k-64381394375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 51504491 + ... + 51505740.

Almost surely, 2^64381394375 is an apocalyptic number.

64381394375 is a deficient number, since it is larger than the sum of its proper divisors (16069596817).

64381394375 is an equidigital number, since it uses as much as digits as its factorization.

64381394375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103010251 (or 103010236 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 53.

The spelling of 64381394375 in words is "sixty-four billion, three hundred eighty-one million, three hundred ninety-four thousand, three hundred seventy-five".