90307605992 has 16 divisors (see below), whose sum is σ = 169424045700. Its totient is φ = 45127860480.

The previous prime is 90307605953. The next prime is 90307606007. The reversal of 90307605992 is 29950670309.

It can be written as a sum of positive squares in 2 ways, for example, as 80210169796 + 10097436196 = 283214^2 + 100486^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90307605992.

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, 3228017 + ... + 3255872.

Almost surely, 2^90307605992 is an apocalyptic number.

It is an amenable number.

90307605992 is a deficient number, since it is larger than the sum of its proper divisors (79116439708).

90307605992 is a wasteful number, since it uses less digits than its factorization.

90307605992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6485636 (or 6485632 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 50.

The spelling of 90307605992 in words is "ninety billion, three hundred seven million, six hundred five thousand, nine hundred ninety-two".