90921703792 has 20 divisors (see below), whose sum is σ = 179908904736. Its totient is φ = 44493599360.

The previous prime is 90921703781. The next prime is 90921703813. The reversal of 90921703792 is 29730712909.

It is a congruent number.

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, 60452509 + ... + 60454012.

Almost surely, 2^90921703792 is an apocalyptic number.

It is an amenable number.

90921703792 is a deficient number, since it is larger than the sum of its proper divisors (88987200944).

90921703792 is a wasteful number, since it uses less digits than its factorization.

90921703792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120906576 (or 120906570 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 49.

The spelling of 90921703792 in words is "ninety billion, nine hundred twenty-one million, seven hundred three thousand, seven hundred ninety-two".