90409665124 has 27 divisors (see below), whose sum is σ = 159443920587. Its totient is φ = 44856943488.

The previous prime is 90409665109. The next prime is 90409665163. The reversal of 90409665124 is 42156690409.

The square root of 90409665124 is 300682.

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

It can be written as a sum of positive squares in 4 ways, for example, as 31748825124 + 58660840000 = 178182^2 + 242200^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 89602732 + ... + 89603740.

Almost surely, 2^90409665124 is an apocalyptic number.

90409665124 is the 300682-nd square number.

It is an amenable number.

90409665124 is a deficient number, since it is larger than the sum of its proper divisors (69034255463).

90409665124 is an equidigital number, since it uses as much as digits as its factorization.

90409665124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 90409665124 in words is "ninety billion, four hundred nine million, six hundred sixty-five thousand, one hundred twenty-four".