631125536 has 12 divisors (see below), whose sum is σ = 1242528462. Its totient is φ = 315562752.

The previous prime is 631125533. The next prime is 631125557. The reversal of 631125536 is 635521136.

It can be written as a sum of positive squares in only one way, i.e., 582739600 + 48385936 = 24140^2 + 6956^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 19722673 = 631125536 / (6 + 3 + 1 + 1 + 2 + 5 + 5 + 3 + 6).

It is not an unprimeable number, because it can be changed into a prime (631125533) by changing a digit.

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 as a sum of consecutive naturals, namely, 9861305 + ... + 9861368.

Almost surely, 2^631125536 is an apocalyptic number.

It is an amenable number.

631125536 is a deficient number, since it is larger than the sum of its proper divisors (611402926).

631125536 is a wasteful number, since it uses less digits than its factorization.

631125536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19722683 (or 19722675 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

The square root of 631125536 is about 25122.2120045190. The cubic root of 631125536 is about 857.7721025593.

The spelling of 631125536 in words is "six hundred thirty-one million, one hundred twenty-five thousand, five hundred thirty-six".