631994790360 has 128 divisors (see below), whose sum is σ = 1947819960000. Its totient is φ = 163927111680.

The previous prime is 631994790341. The next prime is 631994790379. The reversal of 631994790360 is 63097499136.

It is a Cunningham number, because it is equal to 794981²-1.

It is an interprime number because it is at equal distance from previous prime (631994790341) and next prime (631994790379).

It is a self number, because there is not a number n which added to its sum of digits gives 631994790360.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15879766 + ... + 15919514.

Almost surely, 2^631994790360 is an apocalyptic number.

631994790360 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 631994790360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (973909980000).

631994790360 is an abundant number, since it is smaller than the sum of its proper divisors (1315825169640).

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

631994790360 is a wasteful number, since it uses less digits than its factorization.

631994790360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43381 (or 43377 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 57.

The spelling of 631994790360 in words is "six hundred thirty-one billion, nine hundred ninety-four million, seven hundred ninety thousand, three hundred sixty".