64813996 has 48 divisors (see below), whose sum is σ = 130437216. Its totient is φ = 27915264.

The previous prime is 64813993. The next prime is 64814003. The reversal of 64813996 is 69931846.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64813993) 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, 138555 + ... + 139021.

It is an arithmetic number, because the mean of its divisors is an integer number (2717442).

Almost surely, 2^64813996 is an apocalyptic number.

It is an amenable number.

64813996 is an abundant number, since it is smaller than the sum of its proper divisors (65623220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64813996 is a wasteful number, since it uses less digits than its factorization.

64813996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 656 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 64813996 is about 8050.7140056022. The cubic root of 64813996 is about 401.6886858181.

The spelling of 64813996 in words is "sixty-four million, eight hundred thirteen thousand, nine hundred ninety-six".