394797743664 has 20 divisors (see below), whose sum is σ = 1019894171256. Its totient is φ = 131599247872.

The previous prime is 394797743653. The next prime is 394797743689. The reversal of 394797743664 is 466347797493.

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, 4112476449 + ... + 4112476544.

Almost surely, 2^394797743664 is an apocalyptic number.

It is an amenable number.

394797743664 is an abundant number, since it is smaller than the sum of its proper divisors (625096427592).

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

394797743664 is a wasteful number, since it uses less digits than its factorization.

394797743664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8224953004 (or 8224952998 counting only the distinct ones).

The product of its digits is 576108288, while the sum is 69.

The spelling of 394797743664 in words is "three hundred ninety-four billion, seven hundred ninety-seven million, seven hundred forty-three thousand, six hundred sixty-four".