394657933642 has 32 divisors (see below), whose sum is σ = 684647593344. Its totient is φ = 167127417600.

The previous prime is 394657933613. The next prime is 394657933661. The reversal of 394657933642 is 246339756493.

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, 34459 + ... + 889102.

It is an arithmetic number, because the mean of its divisors is an integer number (21395237292).

Almost surely, 2^394657933642 is an apocalyptic number.

394657933642 is a deficient number, since it is larger than the sum of its proper divisors (289989659702).

394657933642 is a wasteful number, since it uses less digits than its factorization.

394657933642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923934.

The product of its digits is 88179840, while the sum is 61.

The spelling of 394657933642 in words is "three hundred ninety-four billion, six hundred fifty-seven million, nine hundred thirty-three thousand, six hundred forty-two".