25980604225 has 9 divisors (see below), whose sum is σ = 32216948617. Its totient is φ = 20783838640.

The previous prime is 25980604207. The next prime is 25980604267. The reversal of 25980604225 is 52240608952.

The square root of 25980604225 is 161185.

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 5698287169 + 20282317056 = 75487^2 + 142416^2 .

It is not a de Polignac number, because 25980604225 - 2¹⁷ = 25980473153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 789807 + ... + 822043.

Almost surely, 2^25980604225 is an apocalyptic number.

25980604225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25980604225 is the 161185-th square number.

25980604225 is the 80593-rd centered octagonal number.

It is an amenable number.

25980604225 is a deficient number, since it is larger than the sum of its proper divisors (6236344392).

25980604225 is an frugal number, since it uses more digits than its factorization.

25980604225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64484 (or 32242 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

It can be divided in two parts, 259 and 80604225, that added together give a square (80604484 = 8978²).

The spelling of 25980604225 in words is "twenty-five billion, nine hundred eighty million, six hundred four thousand, two hundred twenty-five".