631774779708 has 48 divisors (see below), whose sum is σ = 1496956817664. Its totient is φ = 207335631360.

The previous prime is 631774779689. The next prime is 631774779733. The reversal of 631774779708 is 807977477136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272268 + ... + 1697708.

It is an arithmetic number, because the mean of its divisors is an integer number (31186600368).

Almost surely, 2^631774779708 is an apocalyptic number.

It is an amenable number.

631774779708 is an abundant number, since it is smaller than the sum of its proper divisors (865182037956).

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

631774779708 is a wasteful number, since it uses less digits than its factorization.

631774779708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427362 (or 427360 counting only the distinct ones).

The product of its (nonzero) digits is 87127488, while the sum is 66.

The spelling of 631774779708 in words is "six hundred thirty-one billion, seven hundred seventy-four million, seven hundred seventy-nine thousand, seven hundred eight".