90317502881 has 16 divisors (see below), whose sum is σ = 91666164240. Its totient is φ = 88980111360.

The previous prime is 90317502857. The next prime is 90317502911. The reversal of 90317502881 is 18820571309.

It can be written as a sum of positive squares in 8 ways, for example, as 4561651600 + 85755851281 = 67540^2 + 292841^2 .

It is a cyclic number.

It is not a de Polignac number, because 90317502881 - 2²² = 90313308577 is a prime.

It is a super-2 number, since 2×90317502881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90317502851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13745765 + ... + 13752333.

It is an arithmetic number, because the mean of its divisors is an integer number (5729135265).

Almost surely, 2^90317502881 is an apocalyptic number.

It is an amenable number.

90317502881 is a deficient number, since it is larger than the sum of its proper divisors (1348661359).

90317502881 is a wasteful number, since it uses less digits than its factorization.

90317502881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7396.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 90317502881 in words is "ninety billion, three hundred seventeen million, five hundred two thousand, eight hundred eighty-one".