864642715 has 8 divisors (see below), whose sum is σ = 1037967840. Its totient is φ = 691449792.

The previous prime is 864642683. The next prime is 864642739. The reversal of 864642715 is 517246468.

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

It is a cyclic number.

It is not a de Polignac number, because 864642715 - 2⁵ = 864642683 is a prime.

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, 18039 + ... + 45328.

It is an arithmetic number, because the mean of its divisors is an integer number (129745980).

Almost surely, 2^864642715 is an apocalyptic number.

864642715 is a deficient number, since it is larger than the sum of its proper divisors (173325125).

864642715 is a wasteful number, since it uses less digits than its factorization.

864642715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66101.

The product of its digits is 322560, while the sum is 43.

The square root of 864642715 is about 29404.8076851388. The cubic root of 864642715 is about 952.6767408083.

The spelling of 864642715 in words is "eight hundred sixty-four million, six hundred forty-two thousand, seven hundred fifteen".