64305813 has 24 divisors (see below), whose sum is σ = 101501344. Its totient is φ = 35972640.

The previous prime is 64305809. The next prime is 64305821. The reversal of 64305813 is 31850346.

It is not a de Polignac number, because 64305813 - 2² = 64305809 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64305803) 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, 2095 + ... + 11532.

Almost surely, 2^64305813 is an apocalyptic number.

It is an amenable number.

64305813 is a deficient number, since it is larger than the sum of its proper divisors (37195531).

64305813 is a wasteful number, since it uses less digits than its factorization.

64305813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13665 (or 13654 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 64305813 is about 8019.0905344684. The cubic root of 64305813 is about 400.6360983278.

The spelling of 64305813 in words is "sixty-four million, three hundred five thousand, eight hundred thirteen".