626656401 has 12 divisors (see below), whose sum is σ = 1034480512. Its totient is φ = 358089336.

The previous prime is 626656357. The next prime is 626656403. The reversal of 626656401 is 104656626.

It is a happy number.

626656401 is a `hidden beast` number, since 6 + 2 + 6 + 6 + 5 + 640 + 1 = 666.

It is not a de Polignac number, because 626656401 - 2⁶ = 626656337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626656403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4973401 + ... + 4973526.

Almost surely, 2^626656401 is an apocalyptic number.

It is an amenable number.

626656401 is a deficient number, since it is larger than the sum of its proper divisors (407824111).

626656401 is a wasteful number, since it uses less digits than its factorization.

626656401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9946940 (or 9946937 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 626656401 is about 25033.1060997232. The cubic root of 626656401 is about 855.7426153008.

The spelling of 626656401 in words is "six hundred twenty-six million, six hundred fifty-six thousand, four hundred one".