631931049900 has 432 divisors, whose sum is σ = 2179134213984. Its totient is φ = 158296965120.

The previous prime is 631931049863. The next prime is 631931049901. The reversal of 631931049900 is 9940139136.

631931049900 is a `hidden beast` number, since 63 + 1 + 93 + 10 + 499 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (631931049901) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 278015164 + ... + 278017436.

It is an arithmetic number, because the mean of its divisors is an integer number (5044292162).

Almost surely, 2^631931049900 is an apocalyptic number.

631931049900 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 631931049900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089567106992).

631931049900 is an abundant number, since it is smaller than the sum of its proper divisors (1547203164084).

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

631931049900 is a wasteful number, since it uses less digits than its factorization.

631931049900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 631931049900 in words is "six hundred thirty-one billion, nine hundred thirty-one million, forty-nine thousand, nine hundred".