631581022680 has 128 divisors (see below), whose sum is σ = 1941340262400. Its totient is φ = 164289871872.

The previous prime is 631581022669. The next prime is 631581022733. The reversal of 631581022680 is 86220185136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3888457 + ... + 4047623.

It is an arithmetic number, because the mean of its divisors is an integer number (15166720800).

Almost surely, 2^631581022680 is an apocalyptic number.

631581022680 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 631581022680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970670131200).

631581022680 is an abundant number, since it is smaller than the sum of its proper divisors (1309759239720).

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

631581022680 is a wasteful number, since it uses less digits than its factorization.

631581022680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159993 (or 159989 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 631581022680 in words is "six hundred thirty-one billion, five hundred eighty-one million, twenty-two thousand, six hundred eighty".