631312631257 has 16 divisors (see below), whose sum is σ = 805395520512. Its totient is φ = 480491640720.

The previous prime is 631312631203. The next prime is 631312631269. The reversal of 631312631257 is 752136213136.

It is not a de Polignac number, because 631312631257 - 2¹⁵ = 631312598489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631312631297) 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, 95332333 + ... + 95338954.

It is an arithmetic number, because the mean of its divisors is an integer number (50337220032).

Almost surely, 2^631312631257 is an apocalyptic number.

It is an amenable number.

631312631257 is a deficient number, since it is larger than the sum of its proper divisors (174082889255).

631312631257 is a wasteful number, since it uses less digits than its factorization.

631312631257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190671348.

The product of its digits is 136080, while the sum is 40.

The spelling of 631312631257 in words is "six hundred thirty-one billion, three hundred twelve million, six hundred thirty-one thousand, two hundred fifty-seven".