631163680 has 96 divisors (see below), whose sum is σ = 1708729344. Its totient is φ = 215817216.

The previous prime is 631163669. The next prime is 631163683. The reversal of 631163680 is 86361136.

It is a happy number.

It is a super-2 number, since 2×631163680² = 796735181902284800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631163683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730929 + ... + 731791.

It is an arithmetic number, because the mean of its divisors is an integer number (17799264).

Almost surely, 2^631163680 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 631163680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854364672).

631163680 is an abundant number, since it is smaller than the sum of its proper divisors (1077565664).

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

631163680 is a wasteful number, since it uses less digits than its factorization.

631163680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 631163680 is about 25122.9711618670. The cubic root of 631163680 is about 857.7893829037.

The spelling of 631163680 in words is "six hundred thirty-one million, one hundred sixty-three thousand, six hundred eighty".