397550426256 has 45 divisors (see below), whose sum is σ = 1112610215379. Its totient is φ = 132514286688.

The previous prime is 397550426237. The next prime is 397550426279. The reversal of 397550426256 is 652624055793.

It is a happy number.

The square root of 397550426256 is 630516.

It is a perfect power (a square), and thus also a powerful number.

397550426256 is a `hidden beast` number, since 3 + 9 + 7 + 5 + 5 + 0 + 4 + 2 + 625 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7539921 + ... + 7592463.

Almost surely, 2^397550426256 is an apocalyptic number.

397550426256 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

397550426256 is the 630516-th square number.

It is an amenable number.

397550426256 is an abundant number, since it is smaller than the sum of its proper divisors (715059789123).

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

397550426256 is an frugal number, since it uses more digits than its factorization.

397550426256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105100 (or 52548 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 397550426256 in words is "three hundred ninety-seven billion, five hundred fifty million, four hundred twenty-six thousand, two hundred fifty-six".