25732972225 has 9 divisors (see below), whose sum is σ = 31909880163. Its totient is φ = 20585736120.

The previous prime is 25732972219. The next prime is 25732972231. The reversal of 25732972225 is 52227923752.

The square root of 25732972225 is 160415.

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

It is an interprime number because it is at equal distance from previous prime (25732972219) and next prime (25732972231).

It can be written as a sum of positive squares in only one way, i.e., 9263870001 + 16469102224 = 96249^2 + 128332^2 .

It is not a de Polignac number, because 25732972225 - 2¹⁷ = 25732841153 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, 786034 + ... + 818116.

Almost surely, 2^25732972225 is an apocalyptic number.

25732972225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25732972225 is the 160415-th square number.

25732972225 is the 80208-th centered octagonal number.

It is an amenable number.

25732972225 is a deficient number, since it is larger than the sum of its proper divisors (6176907938).

25732972225 is an frugal number, since it uses more digits than its factorization.

25732972225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64176 (or 32088 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 46.

The spelling of 25732972225 in words is "twenty-five billion, seven hundred thirty-two million, nine hundred seventy-two thousand, two hundred twenty-five".