25761407291 has 2 divisors, whose sum is σ = 25761407292. Its totient is φ = 25761407290.

The previous prime is 25761407263. The next prime is 25761407293. The reversal of 25761407291 is 19270416752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25761407291 - 2⁶ = 25761407227 is a prime.

It is a super-2 number, since 2×25761407291² (a number of 22 digits) contains 22 as substring.

Together with 25761407293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25761407293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12880703645 + 12880703646.

It is an arithmetic number, because the mean of its divisors is an integer number (12880703646).

Almost surely, 2^25761407291 is an apocalyptic number.

25761407291 is a deficient number, since it is larger than the sum of its proper divisors (1).

25761407291 is an equidigital number, since it uses as much as digits as its factorization.

25761407291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 25761407291 in words is "twenty-five billion, seven hundred sixty-one million, four hundred seven thousand, two hundred ninety-one".