64764934971 has 16 divisors (see below), whose sum is σ = 94237356288. Its totient is φ = 39237386400.

The previous prime is 64764934967. The next prime is 64764934979. The reversal of 64764934971 is 17943946746.

It is not a de Polignac number, because 64764934971 - 2² = 64764934967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64764934979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258535 + ... + 443136.

It is an arithmetic number, because the mean of its divisors is an integer number (5889834768).

Almost surely, 2^64764934971 is an apocalyptic number.

64764934971 is a deficient number, since it is larger than the sum of its proper divisors (29472421317).

64764934971 is a wasteful number, since it uses less digits than its factorization.

64764934971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704482.

The product of its digits is 27433728, while the sum is 60.

The spelling of 64764934971 in words is "sixty-four billion, seven hundred sixty-four million, nine hundred thirty-four thousand, nine hundred seventy-one".