90840557752 has 16 divisors (see below), whose sum is σ = 194658338160. Its totient is φ = 38931667584.

The previous prime is 90840557749. The next prime is 90840557761. The reversal of 90840557752 is 25775504809.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90840557752.

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, 811076353 + ... + 811076464.

It is an arithmetic number, because the mean of its divisors is an integer number (12166146135).

Almost surely, 2^90840557752 is an apocalyptic number.

It is an amenable number.

90840557752 is an abundant number, since it is smaller than the sum of its proper divisors (103817780408).

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

90840557752 is a wasteful number, since it uses less digits than its factorization.

90840557752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622152830 (or 1622152826 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 90840557752 in words is "ninety billion, eight hundred forty million, five hundred fifty-seven thousand, seven hundred fifty-two".