631625652 has 72 divisors (see below), whose sum is σ = 1836010176. Its totient is φ = 179345664.

The previous prime is 631625647. The next prime is 631625663. The reversal of 631625652 is 256526136.

It is a happy number.

631625652 is a `hidden beast` number, since 6 + 31 + 62 + 565 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33388 + ... + 48764.

Almost surely, 2^631625652 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 631625652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918005088).

631625652 is an abundant number, since it is smaller than the sum of its proper divisors (1204384524).

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

631625652 is a wasteful number, since it uses less digits than its factorization.

631625652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15557 (or 15552 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 631625652 is about 25132.1636951537. The cubic root of 631625652 is about 857.9986144369.

The spelling of 631625652 in words is "six hundred thirty-one million, six hundred twenty-five thousand, six hundred fifty-two".