90181291204 has 9 divisors (see below), whose sum is σ = 157818310671. Its totient is φ = 45090345300.

The previous prime is 90181291181. The next prime is 90181291217. The reversal of 90181291204 is 40219218109.

The square root of 90181291204 is 300302.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 525529 + ... + 675679.

Almost surely, 2^90181291204 is an apocalyptic number.

90181291204 is the 300302-nd square number.

It is an amenable number.

90181291204 is a deficient number, since it is larger than the sum of its proper divisors (67637019467).

90181291204 is an frugal number, since it uses more digits than its factorization.

90181291204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300306 (or 150153 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 90181291204 in words is "ninety billion, one hundred eighty-one million, two hundred ninety-one thousand, two hundred four".