25167730395025 has 9 divisors (see below), whose sum is σ = 31208016793681. Its totient is φ = 20134164249040.

The previous prime is 25167730394999. The next prime is 25167730395107. The reversal of 25167730395025 is 52059303776152.

The square root of 25167730395025 is 5016745.

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 1896522842449 + 23271207552576 = 1377143^2 + 4824024^2 .

It is not a de Polignac number, because 25167730395025 - 2⁵ = 25167730394993 is a prime.

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, 24582051 + ... + 25585399.

Almost surely, 2^{25167730395025} is an apocalyptic number.

25167730395025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25167730395025 is the 5016745-th square number.

25167730395025 is the 2508373-rd centered octagonal number.

It is an amenable number.

25167730395025 is a deficient number, since it is larger than the sum of its proper divisors (6040286398656).

25167730395025 is an frugal number, since it uses more digits than its factorization.

25167730395025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006708 (or 1003354 counting only the distinct ones).

The product of its (nonzero) digits is 11907000, while the sum is 55.

The spelling of 25167730395025 in words is "twenty-five trillion, one hundred sixty-seven billion, seven hundred thirty million, three hundred ninety-five thousand, twenty-five".