31650137672 has 8 divisors (see below), whose sum is σ = 59344008150. Its totient is φ = 15825068832.

The previous prime is 31650137633. The next prime is 31650137683. The reversal of 31650137672 is 27673105613.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26664930436 + 4985207236 = 163294^2 + 70606^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978133597 + ... + 1978133612.

Almost surely, 2^31650137672 is an apocalyptic number.

It is an amenable number.

31650137672 is a deficient number, since it is larger than the sum of its proper divisors (27693870478).

31650137672 is a wasteful number, since it uses less digits than its factorization.

31650137672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956267215 (or 3956267211 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 31650137672 in words is "thirty-one billion, six hundred fifty million, one hundred thirty-seven thousand, six hundred seventy-two".