394663157264 has 40 divisors (see below), whose sum is σ = 777290588760. Its totient is φ = 194072832000.

The previous prime is 394663157227. The next prime is 394663157293. The reversal of 394663157264 is 462751366493.

It can be written as a sum of positive squares in 4 ways, for example, as 16816902400 + 377846254864 = 129680^2 + 614692^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10022414 + ... + 10061714.

It is an arithmetic number, because the mean of its divisors is an integer number (19432264719).

Almost surely, 2^394663157264 is an apocalyptic number.

It is an amenable number.

394663157264 is a deficient number, since it is larger than the sum of its proper divisors (382627431496).

394663157264 is a wasteful number, since it uses less digits than its factorization.

394663157264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49659 (or 49653 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 56.

The spelling of 394663157264 in words is "three hundred ninety-four billion, six hundred sixty-three million, one hundred fifty-seven thousand, two hundred sixty-four".