631210656 has 24 divisors (see below), whose sum is σ = 1656928224. Its totient is φ = 210403520.

The previous prime is 631210651. The next prime is 631210667. The reversal of 631210656 is 656012136.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (631210651) 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 in 3 ways as a sum of consecutive naturals, for example, 3287460 + ... + 3287651.

It is an arithmetic number, because the mean of its divisors is an integer number (69038676).

Almost surely, 2^631210656 is an apocalyptic number.

It is an amenable number.

631210656 is an abundant number, since it is smaller than the sum of its proper divisors (1025717568).

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

631210656 is a wasteful number, since it uses less digits than its factorization.

631210656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6575124 (or 6575116 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 631210656 is about 25123.9060657375. The cubic root of 631210656 is about 857.8106634451.

The spelling of 631210656 in words is "six hundred thirty-one million, two hundred ten thousand, six hundred fifty-six".