31661677464 has 32 divisors (see below), whose sum is σ = 80838328320. Its totient is φ = 10329341216.

The previous prime is 31661677403. The next prime is 31661677471. The reversal of 31661677464 is 46477616613.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14033304 + ... + 14035559.

It is an arithmetic number, because the mean of its divisors is an integer number (2526197760).

Almost surely, 2^31661677464 is an apocalyptic number.

It is an amenable number.

31661677464 is an abundant number, since it is smaller than the sum of its proper divisors (49176650856).

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

31661677464 is a wasteful number, since it uses less digits than its factorization.

31661677464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28068919 (or 28068915 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 51.

The spelling of 31661677464 in words is "thirty-one billion, six hundred sixty-one million, six hundred seventy-seven thousand, four hundred sixty-four".