90173085749390 has 32 divisors (see below), whose sum is σ = 189284611492800. Its totient is φ = 30916486541472.

The previous prime is 90173085749377. The next prime is 90173085749407. The reversal of 90173085749390 is 9394758037109.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13144761257 + ... + 13144768116.

It is an arithmetic number, because the mean of its divisors is an integer number (5915144109150).

Almost surely, 2^{90173085749390} is an apocalyptic number.

90173085749390 is an abundant number, since it is smaller than the sum of its proper divisors (99111525743410).

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

90173085749390 is a wasteful number, since it uses less digits than its factorization.

90173085749390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26289529401 (or 26289529387 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 65.

The spelling of 90173085749390 in words is "ninety trillion, one hundred seventy-three billion, eighty-five million, seven hundred forty-nine thousand, three hundred ninety".