25266253136 has 20 divisors (see below), whose sum is σ = 48967238292. Its totient is φ = 12629546496.

The previous prime is 25266253127. The next prime is 25266253139. The reversal of 25266253136 is 63135266252.

It can be written as a sum of positive squares in 2 ways, for example, as 9173808400 + 16092444736 = 95780^2 + 126856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25266253093 and 25266253102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25266253139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165065 + ... + 278888.

Almost surely, 2^25266253136 is an apocalyptic number.

It is an amenable number.

25266253136 is a deficient number, since it is larger than the sum of its proper divisors (23700985156).

25266253136 is a wasteful number, since it uses less digits than its factorization.

25266253136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447518 (or 447512 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The spelling of 25266253136 in words is "twenty-five billion, two hundred sixty-six million, two hundred fifty-three thousand, one hundred thirty-six".