631310525361 has 24 divisors (see below), whose sum is σ = 921365239080. Its totient is φ = 416505888000.

The previous prime is 631310525317. The next prime is 631310525381. The reversal of 631310525361 is 163525013136.

631310525361 is a `hidden beast` number, since 6 + 3 + 13 + 105 + 2 + 536 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 331067898225 + 300242627136 = 575385^2 + 547944^2 .

It is not a de Polignac number, because 631310525361 - 2³⁷ = 493871571889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631310525381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1732671 + ... + 2065131.

It is an arithmetic number, because the mean of its divisors is an integer number (38390218295).

Almost surely, 2^631310525361 is an apocalyptic number.

It is an amenable number.

631310525361 is a deficient number, since it is larger than the sum of its proper divisors (290054713719).

631310525361 is a wasteful number, since it uses less digits than its factorization.

631310525361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334657 (or 334654 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

Adding to 631310525361 its reverse (163525013136), we get a palindrome (794835538497).

The spelling of 631310525361 in words is "six hundred thirty-one billion, three hundred ten million, five hundred twenty-five thousand, three hundred sixty-one".