90731522559 has 16 divisors (see below), whose sum is σ = 121783540832. Its totient is φ = 60083831808.

The previous prime is 90731522551. The next prime is 90731522591. The reversal of 90731522559 is 95522513709.

It is not a de Polignac number, because 90731522559 - 2³ = 90731522551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90731522551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1588887 + ... + 1644999.

It is an arithmetic number, because the mean of its divisors is an integer number (7611471302).

Almost surely, 2^90731522559 is an apocalyptic number.

90731522559 is a deficient number, since it is larger than the sum of its proper divisors (31052018273).

90731522559 is a wasteful number, since it uses less digits than its factorization.

90731522559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59706.

The product of its (nonzero) digits is 850500, while the sum is 48.

The spelling of 90731522559 in words is "ninety billion, seven hundred thirty-one million, five hundred twenty-two thousand, five hundred fifty-nine".