904326823521 has 27 divisors (see below), whose sum is σ = 1435845122803. Its totient is φ = 548057843520.

The previous prime is 904326823447. The next prime is 904326823573. The reversal of 904326823521 is 125328623409.

The square root of 904326823521 is 950961.

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

904326823521 is a `hidden beast` number, since 9 + 0 + 43 + 2 + 6 + 82 + 3 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 872477424225 + 31849399296 = 934065^2 + 178464^2 .

It is not a de Polignac number, because 904326823521 - 2²¹ = 904324726369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (904326823591) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31367305 + ... + 31396121.

Almost surely, 2^904326823521 is an apocalyptic number.

904326823521 is the 950961-st square number.

904326823521 is the 475481-st centered octagonal number.

It is an amenable number.

904326823521 is a deficient number, since it is larger than the sum of its proper divisors (531518299282).

904326823521 is an frugal number, since it uses more digits than its factorization.

904326823521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57662 (or 28831 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 904326823521 in words is "nine hundred four billion, three hundred twenty-six million, eight hundred twenty-three thousand, five hundred twenty-one".