25449149431225 has 27 divisors (see below), whose sum is σ = 34171570404909. Its totient is φ = 18792975895200.

The previous prime is 25449149431201. The next prime is 25449149431261. The reversal of 25449149431225 is 52213494194452.

The square root of 25449149431225 is 5044715.

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 6559555912569 + 18889593518656 = 2561163^2 + 4346216^2 .

It is not a de Polignac number, because 25449149431225 - 2¹⁷ = 25449149300153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 327867670 + ... + 327945280.

Almost surely, 2^{25449149431225} is an apocalyptic number.

25449149431225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25449149431225 is the 5044715-th square number.

25449149431225 is the 2522358-th centered octagonal number.

It is an amenable number.

25449149431225 is a deficient number, since it is larger than the sum of its proper divisors (8722420973684).

25449149431225 is an frugal number, since it uses more digits than its factorization.

25449149431225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155258 (or 77629 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 55.

The spelling of 25449149431225 in words is "twenty-five trillion, four hundred forty-nine billion, one hundred forty-nine million, four hundred thirty-one thousand, two hundred twenty-five".