90320668520 has 16 divisors (see below), whose sum is σ = 203221504260. Its totient is φ = 36128267392.

The previous prime is 90320668511. The next prime is 90320668579. The reversal of 90320668520 is 2586602309.

It can be written as a sum of positive squares in 2 ways, for example, as 86816265316 + 3504403204 = 294646^2 + 59198^2 .

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, 1129008317 + ... + 1129008396.

Almost surely, 2^90320668520 is an apocalyptic number.

It is an amenable number.

90320668520 is an abundant number, since it is smaller than the sum of its proper divisors (112900835740).

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

90320668520 is a wasteful number, since it uses less digits than its factorization.

90320668520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258016724 (or 2258016720 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 90320668520 in words is "ninety billion, three hundred twenty million, six hundred sixty-eight thousand, five hundred twenty".