64632513 has 24 divisors (see below), whose sum is σ = 95223744. Its totient is φ = 38964640.

The previous prime is 64632499. The next prime is 64632517. The reversal of 64632513 is 31523646.

It is not a de Polignac number, because 64632513 - 2⁸ = 64632257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64632517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95131 + ... + 95807.

It is an arithmetic number, because the mean of its divisors is an integer number (3967656).

Almost surely, 2^64632513 is an apocalyptic number.

It is an amenable number.

64632513 is a deficient number, since it is larger than the sum of its proper divisors (30591231).

64632513 is a wasteful number, since it uses less digits than its factorization.

64632513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 954 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 64632513 is about 8039.4348681981. The cubic root of 64632513 is about 401.3134180291.

The spelling of 64632513 in words is "sixty-four million, six hundred thirty-two thousand, five hundred thirteen".