64671513 has 12 divisors (see below), whose sum is σ = 86900688. Its totient is φ = 42780880.

The previous prime is 64671511. The next prime is 64671521. The reversal of 64671513 is 31517646.

It is not a de Polignac number, because 64671513 - 2¹ = 64671511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64671511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66118 + ... + 67088.

It is an arithmetic number, because the mean of its divisors is an integer number (7241724).

Almost surely, 2^64671513 is an apocalyptic number.

It is an amenable number.

64671513 is a deficient number, since it is larger than the sum of its proper divisors (22229175).

64671513 is an equidigital number, since it uses as much as digits as its factorization.

64671513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1123 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 64671513 is about 8041.8600460341. The cubic root of 64671513 is about 401.3941208394.

The spelling of 64671513 in words is "sixty-four million, six hundred seventy-one thousand, five hundred thirteen".