631694652940 has 96 divisors (see below), whose sum is σ = 1436047704000. Its totient is φ = 232028070912.

The previous prime is 631694652929. The next prime is 631694652977. The reversal of 631694652940 is 49256496136.

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, 49581091 + ... + 49593829.

It is an arithmetic number, because the mean of its divisors is an integer number (14958830250).

Almost surely, 2^631694652940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631694652940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718023852000).

631694652940 is an abundant number, since it is smaller than the sum of its proper divisors (804353051060).

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

631694652940 is a wasteful number, since it uses less digits than its factorization.

631694652940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13739 (or 13737 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 631694652940 in words is "six hundred thirty-one billion, six hundred ninety-four million, six hundred fifty-two thousand, nine hundred forty".