631256705144 has 48 divisors (see below), whose sum is σ = 1281852523800. Its totient is φ = 291304700544.

The previous prime is 631256705119. The next prime is 631256705207. The reversal of 631256705144 is 441507652136.

It is a junction number, because it is equal to n+sod(n) for n = 631256705095 and 631256705104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9814562 + ... + 9878670.

Almost surely, 2^631256705144 is an apocalyptic number.

It is an amenable number.

631256705144 is an abundant number, since it is smaller than the sum of its proper divisors (650595818656).

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

631256705144 is a wasteful number, since it uses less digits than its factorization.

631256705144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71424 (or 71407 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 631256705144 in words is "six hundred thirty-one billion, two hundred fifty-six million, seven hundred five thousand, one hundred forty-four".