31628216608 has 24 divisors (see below), whose sum is σ = 62743388400. Its totient is φ = 15693387840.

The previous prime is 31628216591. The next prime is 31628216617. The reversal of 31628216608 is 80661282613.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3768258 + ... + 3776641.

It is an arithmetic number, because the mean of its divisors is an integer number (2614307850).

Almost surely, 2^31628216608 is an apocalyptic number.

It is an amenable number.

31628216608 is a deficient number, since it is larger than the sum of its proper divisors (31115171792).

31628216608 is a wasteful number, since it uses less digits than its factorization.

31628216608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7545040 (or 7545032 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 31628216608 in words is "thirty-one billion, six hundred twenty-eight million, two hundred sixteen thousand, six hundred eight".