631398087936 has 1728 divisors, whose sum is σ = 2505388032000. Its totient is φ = 156473856000.

The previous prime is 631398087923. The next prime is 631398087959. The reversal of 631398087936 is 639780893136.

It is a tau number, because it is divible by the number of its divisors (1728).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8892930781 + ... + 8892930851.

Almost surely, 2^631398087936 is an apocalyptic number.

631398087936 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 631398087936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252694016000).

631398087936 is an abundant number, since it is smaller than the sum of its proper divisors (1873989944064).

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

631398087936 is a wasteful number, since it uses less digits than its factorization.

631398087936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 631398087936 in words is "six hundred thirty-one billion, three hundred ninety-eight million, eighty-seven thousand, nine hundred thirty-six".