90246902691 has 24 divisors (see below), whose sum is σ = 133304184832. Its totient is φ = 54264394800.

The previous prime is 90246902687. The next prime is 90246902719. The reversal of 90246902691 is 19620964209.

It is not a de Polignac number, because 90246902691 - 2² = 90246902687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90246902691.

It is not an unprimeable number, because it can be changed into a prime (90246902651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 932695 + ... + 1024896.

Almost surely, 2^90246902691 is an apocalyptic number.

90246902691 is a deficient number, since it is larger than the sum of its proper divisors (43057282141).

90246902691 is a wasteful number, since it uses less digits than its factorization.

90246902691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957743 (or 1957732 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The spelling of 90246902691 in words is "ninety billion, two hundred forty-six million, nine hundred two thousand, six hundred ninety-one".