394663004664 has 16 divisors (see below), whose sum is σ = 986657511720. Its totient is φ = 131554334880.

The previous prime is 394663004647. The next prime is 394663004777. The reversal of 394663004664 is 466400366493.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 8222145907 + ... + 8222145954.

Almost surely, 2^394663004664 is an apocalyptic number.

It is an amenable number.

394663004664 is an abundant number, since it is smaller than the sum of its proper divisors (591994507056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394663004664 is a wasteful number, since it uses less digits than its factorization.

394663004664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16444291870 (or 16444291866 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 51.

The spelling of 394663004664 in words is "three hundred ninety-four billion, six hundred sixty-three million, four thousand, six hundred sixty-four".