31656546650 has 12 divisors (see below), whose sum is σ = 58881176862. Its totient is φ = 12662618640.

The previous prime is 31656546643. The next prime is 31656546667. The reversal of 31656546650 is 5664565613.

It can be written as a sum of positive squares in 3 ways, for example, as 24997823449 + 6658723201 = 158107^2 + 81601^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31656546595 and 31656546604.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 316565417 + ... + 316565516.

Almost surely, 2^31656546650 is an apocalyptic number.

31656546650 is a deficient number, since it is larger than the sum of its proper divisors (27224630212).

31656546650 is a wasteful number, since it uses less digits than its factorization.

31656546650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633130945 (or 633130940 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 31656546650 in words is "thirty-one billion, six hundred fifty-six million, five hundred forty-six thousand, six hundred fifty".