864517471994 has 32 divisors (see below), whose sum is σ = 1428035277312. Its totient is φ = 389249278000.

The previous prime is 864517471973. The next prime is 864517472011. The reversal of 864517471994 is 499174715468.

It is a self number, because there is not a number n which added to its sum of digits gives 864517471994.

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, 43235339 + ... + 43255329.

It is an arithmetic number, because the mean of its divisors is an integer number (44626102416).

Almost surely, 2^864517471994 is an apocalyptic number.

864517471994 is a deficient number, since it is larger than the sum of its proper divisors (563517805318).

864517471994 is a wasteful number, since it uses less digits than its factorization.

864517471994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38482.

The product of its digits is 60963840, while the sum is 65.

The spelling of 864517471994 in words is "eight hundred sixty-four billion, five hundred seventeen million, four hundred seventy-one thousand, nine hundred ninety-four".