25504728804 has 81 divisors (see below), whose sum is σ = 66111266403. Its totient is φ = 8290450224.

The previous prime is 25504728791. The next prime is 25504728811. The reversal of 25504728804 is 40882740552.

The square root of 25504728804 is 159702.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25504728804.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 41202807 + ... + 41203425.

Almost surely, 2^25504728804 is an apocalyptic number.

25504728804 is the 159702-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25504728804

25504728804 is an abundant number, since it is smaller than the sum of its proper divisors (40606537599).

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

25504728804 is an equidigital number, since it uses as much as digits as its factorization.

25504728804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 45.

The spelling of 25504728804 in words is "twenty-five billion, five hundred four million, seven hundred twenty-eight thousand, eight hundred four".