25435465225 has 27 divisors (see below), whose sum is σ = 31896965191. Its totient is φ = 20120627600.

The previous prime is 25435465213. The next prime is 25435465273. The reversal of 25435465225 is 52256453452.

The square root of 25435465225 is 159485.

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

It can be written as a sum of positive squares in only one way, i.e., 9156767481 + 16278697744 = 95691^2 + 127588^2 .

It is not a de Polignac number, because 25435465225 - 2⁹ = 25435464713 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, 133169880 + ... + 133170070.

Almost surely, 2^25435465225 is an apocalyptic number.

25435465225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25435465225 is the 159485-th square number.

25435465225 is the 79743-rd centered octagonal number.

It is an amenable number.

25435465225 is a deficient number, since it is larger than the sum of its proper divisors (6461499966).

25435465225 is an frugal number, since it uses more digits than its factorization.

25435465225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 363 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 43.

The spelling of 25435465225 in words is "twenty-five billion, four hundred thirty-five million, four hundred sixty-five thousand, two hundred twenty-five".