90164315523 has 4 divisors (see below), whose sum is σ = 120219087368. Its totient is φ = 60109543680.

The previous prime is 90164315519. The next prime is 90164315537. The reversal of 90164315523 is 32551346109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32551346109 = 3 ⋅10850448703.

It is not a de Polignac number, because 90164315523 - 2² = 90164315519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90164315503) 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 3 ways as a sum of consecutive naturals, for example, 15027385918 + ... + 15027385923.

It is an arithmetic number, because the mean of its divisors is an integer number (30054771842).

Almost surely, 2^90164315523 is an apocalyptic number.

90164315523 is a deficient number, since it is larger than the sum of its proper divisors (30054771845).

90164315523 is a wasteful number, since it uses less digits than its factorization.

90164315523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30054771844.

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 90164315523 in words is "ninety billion, one hundred sixty-four million, three hundred fifteen thousand, five hundred twenty-three".