25502493025 has 45 divisors (see below), whose sum is σ = 34209439455. Its totient is φ = 18856785600.

The previous prime is 25502493007. The next prime is 25502493059. The reversal of 25502493025 is 52039420552.

It is a happy number.

The square root of 25502493025 is 159695.

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

It can be written as a sum of positive squares in 7 ways, for example, as 19966537809 + 5535955216 = 141303^2 + 74404^2 .

It is not a de Polignac number, because 25502493025 - 2²⁷ = 25368275297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 622012005 + ... + 622012045.

Almost surely, 2^25502493025 is an apocalyptic number.

25502493025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25502493025 is the 159695-th square number.

25502493025 is the 79848-th centered octagonal number.

It is an amenable number.

25502493025 is a deficient number, since it is larger than the sum of its proper divisors (8706946430).

25502493025 is an frugal number, since it uses more digits than its factorization.

25502493025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 25502493025 in words is "twenty-five billion, five hundred two million, four hundred ninety-three thousand, twenty-five".