631253656 has 64 divisors (see below), whose sum is σ = 1371492000. Its totient is φ = 269199360.

The previous prime is 631253647. The next prime is 631253657. The reversal of 631253656 is 656352136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631253657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761050 + ... + 761878.

Almost surely, 2^631253656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631253656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685746000).

631253656 is an abundant number, since it is smaller than the sum of its proper divisors (740238344).

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

631253656 is a wasteful number, since it uses less digits than its factorization.

631253656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372 (or 1368 counting only the distinct ones).

The product of its digits is 97200, while the sum is 37.

The square root of 631253656 is about 25124.7618098162. The cubic root of 631253656 is about 857.8301418979.

The spelling of 631253656 in words is "six hundred thirty-one million, two hundred fifty-three thousand, six hundred fifty-six".