631256938257 has 16 divisors (see below), whose sum is σ = 935516288448. Its totient is φ = 375361471680.

The previous prime is 631256938253. The next prime is 631256938307. The reversal of 631256938257 is 752839652136.

It is not a de Polignac number, because 631256938257 - 2² = 631256938253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631256938197 and 631256938206.

It is not an unprimeable number, because it can be changed into a prime (631256938253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180460498 + ... + 180463995.

It is an arithmetic number, because the mean of its divisors is an integer number (58469768028).

Almost surely, 2^631256938257 is an apocalyptic number.

It is an amenable number.

631256938257 is a deficient number, since it is larger than the sum of its proper divisors (304259350191).

631256938257 is a wasteful number, since it uses less digits than its factorization.

631256938257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360924560.

The product of its digits is 16329600, while the sum is 57.

The spelling of 631256938257 in words is "six hundred thirty-one billion, two hundred fifty-six million, nine hundred thirty-eight thousand, two hundred fifty-seven".