25249670259025 has 9 divisors (see below), whose sum is σ = 31309622275633. Its totient is φ = 20199716107600.

The previous prime is 25249670259019. The next prime is 25249670259059. The reversal of 25249670259025 is 52095207694252.

The square root of 25249670259025 is 5024905.

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 4055579739409 + 21194090519616 = 2013847^2 + 4603704^2 .

It is not a de Polignac number, because 25249670259025 - 2²³ = 25249661870417 is a prime.

It is a super-2 number, since 2×25249670259025² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24622035 + ... + 25627015.

Almost surely, 2^{25249670259025} is an apocalyptic number.

25249670259025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25249670259025 is the 5024905-th square number.

25249670259025 is the 2512453-rd centered octagonal number.

It is an amenable number.

25249670259025 is a deficient number, since it is larger than the sum of its proper divisors (6059952016608).

25249670259025 is an frugal number, since it uses more digits than its factorization.

25249670259025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009972 (or 1004986 counting only the distinct ones).

The product of its (nonzero) digits is 27216000, while the sum is 58.

The spelling of 25249670259025 in words is "twenty-five trillion, two hundred forty-nine billion, six hundred seventy million, two hundred fifty-nine thousand, twenty-five".