64651215 has 8 divisors (see below), whose sum is σ = 103441968. Its totient is φ = 34480640.

The previous prime is 64651207. The next prime is 64651241. The reversal of 64651215 is 51215646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64651215 - 2³ = 64651207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2155026 + ... + 2155055.

It is an arithmetic number, because the mean of its divisors is an integer number (12930246).

Almost surely, 2^64651215 is an apocalyptic number.

64651215 is a deficient number, since it is larger than the sum of its proper divisors (38790753).

64651215 is a wasteful number, since it uses less digits than its factorization.

64651215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310089.

The product of its digits is 7200, while the sum is 30.

The square root of 64651215 is about 8040.5979255277. The cubic root of 64651215 is about 401.3521221807.

The spelling of 64651215 in words is "sixty-four million, six hundred fifty-one thousand, two hundred fifteen".