25126656631 has 2 divisors, whose sum is σ = 25126656632. Its totient is φ = 25126656630.

The previous prime is 25126656623. The next prime is 25126656671. The reversal of 25126656631 is 13665662152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25126656631 - 2³ = 25126656623 is a prime.

It is a super-2 number, since 2×25126656631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25126656601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12563328315 + 12563328316.

It is an arithmetic number, because the mean of its divisors is an integer number (12563328316).

Almost surely, 2^25126656631 is an apocalyptic number.

25126656631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25126656631 is an equidigital number, since it uses as much as digits as its factorization.

25126656631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The spelling of 25126656631 in words is "twenty-five billion, one hundred twenty-six million, six hundred fifty-six thousand, six hundred thirty-one".