631600000 has 96 divisors (see below), whose sum is σ = 1573727400. Its totient is φ = 252480000.

The previous prime is 631599989. The next prime is 631600007. The reversal of 631600000 is 6136.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631600007) 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 11 ways as a sum of consecutive naturals, for example, 399211 + ... + 400789.

Almost surely, 2^631600000 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 631600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786863700).

631600000 is an abundant number, since it is smaller than the sum of its proper divisors (942127400).

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

631600000 is an frugal number, since it uses more digits than its factorization.

631600000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1586 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 631600000 is about 25131.6533479196. The cubic root of 631600000 is about 857.9869990767.

Adding to 631600000 its reverse (6136), we get a palindrome (631606136).

The spelling of 631600000 in words is "six hundred thirty-one million, six hundred thousand".