631430251336 has 16 divisors (see below), whose sum is σ = 1188538463340. Its totient is φ = 314486661120.

The previous prime is 631430251321. The next prime is 631430251343. The reversal of 631430251336 is 633152034136.

It can be written as a sum of positive squares in 2 ways, for example, as 532324915236 + 99105336100 = 729606^2 + 314810^2 .

It is a junction number, because it is equal to n+sod(n) for n = 631430251295 and 631430251304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153555885 + ... + 153559996.

Almost surely, 2^631430251336 is an apocalyptic number.

It is an amenable number.

631430251336 is a deficient number, since it is larger than the sum of its proper divisors (557108212004).

631430251336 is a wasteful number, since it uses less digits than its factorization.

631430251336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307116144 (or 307116140 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 37.

The spelling of 631430251336 in words is "six hundred thirty-one billion, four hundred thirty million, two hundred fifty-one thousand, three hundred thirty-six".