631572660 has 96 divisors (see below), whose sum is σ = 1969269120. Its totient is φ = 168044544.

The previous prime is 631572659. The next prime is 631572719. The reversal of 631572660 is 66275136.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310567 + ... + 312593.

It is an arithmetic number, because the mean of its divisors is an integer number (20513220).

Almost surely, 2^631572660 is an apocalyptic number.

631572660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631572660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984634560).

631572660 is an abundant number, since it is smaller than the sum of its proper divisors (1337696460).

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

631572660 is a wasteful number, since it uses less digits than its factorization.

631572660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622 (or 2614 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 631572660 is about 25131.1094064707. The cubic root of 631572660 is about 857.9746190350.

The spelling of 631572660 in words is "six hundred thirty-one million, five hundred seventy-two thousand, six hundred sixty".