864991618 has 8 divisors (see below), whose sum is σ = 1297743120. Its totient is φ = 432410580.

The previous prime is 864991607. The next prime is 864991639. The reversal of 864991618 is 816199468.

864991618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29068 + ... + 50743.

It is an arithmetic number, because the mean of its divisors is an integer number (162217890).

Almost surely, 2^864991618 is an apocalyptic number.

864991618 is a deficient number, since it is larger than the sum of its proper divisors (432751502).

864991618 is a wasteful number, since it uses less digits than its factorization.

864991618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85232.

The product of its digits is 746496, while the sum is 52.

The square root of 864991618 is about 29410.7398410853. The cubic root of 864991618 is about 952.8048658199.

The spelling of 864991618 in words is "eight hundred sixty-four million, nine hundred ninety-one thousand, six hundred eighteen".