25268369081 has 2 divisors, whose sum is σ = 25268369082. Its totient is φ = 25268369080.

The previous prime is 25268369053. The next prime is 25268369107. The reversal of 25268369081 is 18096386252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13475495056 + 11792874025 = 116084^2 + 108595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25268369081 is a prime.

It is a super-2 number, since 2×25268369081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25268369281) 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 as a sum of consecutive naturals, namely, 12634184540 + 12634184541.

It is an arithmetic number, because the mean of its divisors is an integer number (12634184541).

Almost surely, 2^25268369081 is an apocalyptic number.

It is an amenable number.

25268369081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25268369081 is an equidigital number, since it uses as much as digits as its factorization.

25268369081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 25268369081 in words is "twenty-five billion, two hundred sixty-eight million, three hundred sixty-nine thousand, eighty-one".