64792521 has 16 divisors (see below), whose sum is σ = 96163200. Its totient is φ = 43116624.

The previous prime is 64792517. The next prime is 64792523. The reversal of 64792521 is 12529746.

64792521 is a `hidden beast` number, since 6 + 47 + 92 + 521 = 666.

It is not a de Polignac number, because 64792521 - 2² = 64792517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64792523) 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, 15615 + ... + 19323.

It is an arithmetic number, because the mean of its divisors is an integer number (6010200).

Almost surely, 2^64792521 is an apocalyptic number.

It is an amenable number.

64792521 is a deficient number, since it is larger than the sum of its proper divisors (31370679).

64792521 is a wasteful number, since it uses less digits than its factorization.

64792521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365 (or 4359 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 64792521 is about 8049.3801624721. The cubic root of 64792521 is about 401.6443167108.

The spelling of 64792521 in words is "sixty-four million, seven hundred ninety-two thousand, five hundred twenty-one".