25436022525 has 72 divisors (see below), whose sum is σ = 47588561280. Its totient is φ = 12970581120.

The previous prime is 25436022517. The next prime is 25436022539. The reversal of 25436022525 is 52522063452.

25436022525 is a `hidden beast` number, since 2 + 5 + 4 + 3 + 602 + 25 + 25 = 666.

It is not a de Polignac number, because 25436022525 - 2³ = 25436022517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25436022525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 653152 + ... + 690998.

It is an arithmetic number, because the mean of its divisors is an integer number (660952240).

Almost surely, 2^25436022525 is an apocalyptic number.

25436022525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25436022525 is a deficient number, since it is larger than the sum of its proper divisors (22152538755).

25436022525 is a wasteful number, since it uses less digits than its factorization.

25436022525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37995 (or 37987 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 25436022525 its reverse (52522063452), we get a palindrome (77958085977).

The spelling of 25436022525 in words is "twenty-five billion, four hundred thirty-six million, twenty-two thousand, five hundred twenty-five".