631861799380 has 48 divisors (see below), whose sum is σ = 1605672343296. Its totient is φ = 203894899200.

The previous prime is 631861799377. The next prime is 631861799383. The reversal of 631861799380 is 83997168136.

It is an interprime number because it is at equal distance from previous prime (631861799377) and next prime (631861799383).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631861799383) 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, 132741696 + ... + 132746455.

It is an arithmetic number, because the mean of its divisors is an integer number (33451507152).

Almost surely, 2^631861799380 is an apocalyptic number.

It is an amenable number.

631861799380 is an abundant number, since it is smaller than the sum of its proper divisors (973810543916).

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

631861799380 is a wasteful number, since it uses less digits than its factorization.

631861799380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265488184 (or 265488182 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 631861799380 in words is "six hundred thirty-one billion, eight hundred sixty-one million, seven hundred ninety-nine thousand, three hundred eighty".