64601515 has 16 divisors (see below), whose sum is σ = 85448160. Its totient is φ = 46494720.

The previous prime is 64601507. The next prime is 64601521. The reversal of 64601515 is 51510646.

It is not a de Polignac number, because 64601515 - 2³ = 64601507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720 + ... + 11389.

It is an arithmetic number, because the mean of its divisors is an integer number (5340510).

Almost surely, 2^64601515 is an apocalyptic number.

64601515 is a deficient number, since it is larger than the sum of its proper divisors (20846645).

64601515 is a wasteful number, since it uses less digits than its factorization.

64601515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12222.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 64601515 is about 8037.5067651604. The cubic root of 64601515 is about 401.2492506205.

The spelling of 64601515 in words is "sixty-four million, six hundred one thousand, five hundred fifteen".