399682563264 has 168 divisors, whose sum is σ = 1167733148400. Its totient is φ = 130672852992.

The previous prime is 399682563151. The next prime is 399682563283. The reversal of 399682563264 is 462365286993.

399682563264 is a `hidden beast` number, since 3 + 9 + 9 + 6 + 8 + 2 + 563 + 2 + 64 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8969712 + ... + 9014160.

It is an arithmetic number, because the mean of its divisors is an integer number (6950792550).

Almost surely, 2^399682563264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399682563264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583866574200).

399682563264 is an abundant number, since it is smaller than the sum of its proper divisors (768050585136).

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

399682563264 is a wasteful number, since it uses less digits than its factorization.

399682563264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44767 (or 44754 counting only the distinct ones).

The product of its digits is 100776960, while the sum is 63.

The spelling of 399682563264 in words is "three hundred ninety-nine billion, six hundred eighty-two million, five hundred sixty-three thousand, two hundred sixty-four".