90285180523 has 16 divisors (see below), whose sum is σ = 97190438400. Its totient is φ = 83701447200.

The previous prime is 90285180509. The next prime is 90285180551. The reversal of 90285180523 is 32508158209.

It is not a de Polignac number, because 90285180523 - 2¹³ = 90285172331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90285180523.

It is not an unprimeable number, because it can be changed into a prime (90285180563) 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, 540003 + ... + 687148.

It is an arithmetic number, because the mean of its divisors is an integer number (6074402400).

Almost surely, 2^90285180523 is an apocalyptic number.

90285180523 is a deficient number, since it is larger than the sum of its proper divisors (6905257877).

90285180523 is a wasteful number, since it uses less digits than its factorization.

90285180523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227282.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 90285180523 in words is "ninety billion, two hundred eighty-five million, one hundred eighty thousand, five hundred twenty-three".