64864815 has 8 divisors (see below), whose sum is σ = 103783728. Its totient is φ = 34594560.

The previous prime is 64864799. The next prime is 64864817. The reversal of 64864815 is 51846846.

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

It is not a de Polignac number, because 64864815 - 2⁴ = 64864799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64864817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2162146 + ... + 2162175.

It is an arithmetic number, because the mean of its divisors is an integer number (12972966).

Almost surely, 2^64864815 is an apocalyptic number.

64864815 is a deficient number, since it is larger than the sum of its proper divisors (38918913).

64864815 is a wasteful number, since it uses less digits than its factorization.

64864815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324329.

The product of its digits is 184320, while the sum is 42.

The square root of 64864815 is about 8053.8695668604. The cubic root of 64864815 is about 401.7936430069.

The spelling of 64864815 in words is "sixty-four million, eight hundred sixty-four thousand, eight hundred fifteen".