631504896 has 152 divisors (see below), whose sum is σ = 1862267424. Its totient is φ = 188743680.

The previous prime is 631504891. The next prime is 631504921. The reversal of 631504896 is 698405136.

It is not an unprimeable number, because it can be changed into a prime (631504891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8650716 + ... + 8650788.

Almost surely, 2^631504896 is an apocalyptic number.

631504896 is a gapful number since it is divisible by the number (66) 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 631504896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931133712).

631504896 is an abundant number, since it is smaller than the sum of its proper divisors (1230762528).

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

631504896 is an frugal number, since it uses more digits than its factorization.

631504896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 631504896 is about 25129.7611608228. The cubic root of 631504896 is about 857.9439327418.

The spelling of 631504896 in words is "six hundred thirty-one million, five hundred four thousand, eight hundred ninety-six".