631694737380 has 192 divisors, whose sum is σ = 2080583188992. Its totient is φ = 140178677760.

The previous prime is 631694737369. The next prime is 631694737381. The reversal of 631694737380 is 83737496136.

It is a self number, because there is not a number n which added to its sum of digits gives 631694737380.

It is not an unprimeable number, because it can be changed into a prime (631694737381) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7119852 + ... + 7208028.

It is an arithmetic number, because the mean of its divisors is an integer number (10836370776).

Almost surely, 2^631694737380 is an apocalyptic number.

631694737380 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 631694737380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040291594496).

631694737380 is an abundant number, since it is smaller than the sum of its proper divisors (1448888451612).

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

631694737380 is a wasteful number, since it uses less digits than its factorization.

631694737380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88694 (or 88692 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 57.

The spelling of 631694737380 in words is "six hundred thirty-one billion, six hundred ninety-four million, seven hundred thirty-seven thousand, three hundred eighty".