631261044 has 36 divisors (see below), whose sum is σ = 1611189216. Its totient is φ = 208376208.

The previous prime is 631261039. The next prime is 631261093. The reversal of 631261044 is 440162136.

631261044 is a `hidden beast` number, since 6 + 3 + 1 + 2 + 610 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 631260999 and 631261017.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 81414 + ... + 88829.

It is an arithmetic number, because the mean of its divisors is an integer number (44755256).

Almost surely, 2^631261044 is an apocalyptic number.

It is an amenable number.

631261044 is an abundant number, since it is smaller than the sum of its proper divisors (979928172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631261044 is a wasteful number, since it uses less digits than its factorization.

631261044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170356 (or 170351 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 631261044 is about 25124.9088356555. The cubic root of 631261044 is about 857.8334884789.

The spelling of 631261044 in words is "six hundred thirty-one million, two hundred sixty-one thousand, forty-four".