25349416225 has 27 divisors (see below), whose sum is σ = 36573279417. Its totient is φ = 17378635680.

The previous prime is 25349416109. The next prime is 25349416231. The reversal of 25349416225 is 52261494352.

The square root of 25349416225 is 159215.

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 268992801 + 25080423424 = 16401^2 + 158368^2 .

It is not a de Polignac number, because 25349416225 - 2³¹ = 23201932577 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, 5570251 + ... + 5574799.

Almost surely, 2^25349416225 is an apocalyptic number.

25349416225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25349416225 is the 159215-th square number.

25349416225 is the 79608-th centered octagonal number.

It is an amenable number.

25349416225 is a deficient number, since it is larger than the sum of its proper divisors (11223863192).

25349416225 is an frugal number, since it uses more digits than its factorization.

25349416225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9122 (or 4561 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The spelling of 25349416225 in words is "twenty-five billion, three hundred forty-nine million, four hundred sixteen thousand, two hundred twenty-five".