31650685428 has 12 divisors (see below), whose sum is σ = 73851599360. Its totient is φ = 10550228472.

The previous prime is 31650685427. The next prime is 31650685441. The reversal of 31650685428 is 82458605613.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31650685427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318778548 + ... + 1318778571.

Almost surely, 2^31650685428 is an apocalyptic number.

It is an amenable number.

31650685428 is an abundant number, since it is smaller than the sum of its proper divisors (42200913932).

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

31650685428 is a wasteful number, since it uses less digits than its factorization.

31650685428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637557126 (or 2637557124 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 31650685428 in words is "thirty-one billion, six hundred fifty million, six hundred eighty-five thousand, four hundred twenty-eight".