31682221648 has 60 divisors (see below), whose sum is σ = 77897728512. Its totient is φ = 12343719360.

The previous prime is 31682221621. The next prime is 31682221667. The reversal of 31682221648 is 84612228613.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1828240 + ... + 1845487.

Almost surely, 2^31682221648 is an apocalyptic number.

It is an amenable number.

31682221648 is an abundant number, since it is smaller than the sum of its proper divisors (46215506864).

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

31682221648 is a wasteful number, since it uses less digits than its factorization.

31682221648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673760 (or 3673747 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The spelling of 31682221648 in words is "thirty-one billion, six hundred eighty-two million, two hundred twenty-one thousand, six hundred forty-eight".