25637852868631 has 2 divisors, whose sum is σ = 25637852868632. Its totient is φ = 25637852868630.

The previous prime is 25637852868619. The next prime is 25637852868647. The reversal of 25637852868631 is 13686825873652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25637852868631 - 2⁵ = 25637852868599 is a prime.

It is a super-2 number, since 2×25637852868631² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25637859868631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12818926434315 + 12818926434316.

It is an arithmetic number, because the mean of its divisors is an integer number (12818926434316).

Almost surely, 2^{25637852868631} is an apocalyptic number.

25637852868631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25637852868631 is an equidigital number, since it uses as much as digits as its factorization.

25637852868631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 696729600, while the sum is 70.

The spelling of 25637852868631 in words is "twenty-five trillion, six hundred thirty-seven billion, eight hundred fifty-two million, eight hundred sixty-eight thousand, six hundred thirty-one".