25653442631 has 2 divisors, whose sum is σ = 25653442632. Its totient is φ = 25653442630.

The previous prime is 25653442613. The next prime is 25653442649. The reversal of 25653442631 is 13624435652.

Together with previous prime (25653442613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (25653442613) and next prime (25653442649).

It is a cyclic number.

It is not a de Polignac number, because 25653442631 - 2⁶ = 25653442567 is a prime.

It is a super-2 number, since 2×25653442631² (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 (25653442531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12826721315 + 12826721316.

It is an arithmetic number, because the mean of its divisors is an integer number (12826721316).

Almost surely, 2^25653442631 is an apocalyptic number.

25653442631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25653442631 is an equidigital number, since it uses as much as digits as its factorization.

25653442631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 41.

The spelling of 25653442631 in words is "twenty-five billion, six hundred fifty-three million, four hundred forty-two thousand, six hundred thirty-one".