90807022640 has 20 divisors (see below), whose sum is σ = 211126327824. Its totient is φ = 36322809024.

The previous prime is 90807022627. The next prime is 90807022667. The reversal of 90807022640 is 4622070809.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 90807022594 and 90807022603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567543812 + ... + 567543971.

Almost surely, 2^90807022640 is an apocalyptic number.

It is an amenable number.

90807022640 is an abundant number, since it is smaller than the sum of its proper divisors (120319305184).

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

90807022640 is a wasteful number, since it uses less digits than its factorization.

90807022640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135087796 (or 1135087790 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 90807022640 in words is "ninety billion, eight hundred seven million, twenty-two thousand, six hundred forty".