864812618 has 32 divisors (see below), whose sum is σ = 1354761408. Its totient is φ = 413683200.

The previous prime is 864812609. The next prime is 864812623. The reversal of 864812618 is 816218468.

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, 1514273 + ... + 1514843.

It is an arithmetic number, because the mean of its divisors is an integer number (42336294).

Almost surely, 2^864812618 is an apocalyptic number.

864812618 is a deficient number, since it is larger than the sum of its proper divisors (489948790).

864812618 is a wasteful number, since it uses less digits than its factorization.

864812618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918.

The product of its digits is 147456, while the sum is 44.

The square root of 864812618 is about 29407.6965775968. The cubic root of 864812618 is about 952.7391373075.

The spelling of 864812618 in words is "eight hundred sixty-four million, eight hundred twelve thousand, six hundred eighteen".