25612327291 has 2 divisors, whose sum is σ = 25612327292. Its totient is φ = 25612327290.

The previous prime is 25612327289. The next prime is 25612327333. The reversal of 25612327291 is 19272321652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25612327291 - 2¹ = 25612327289 is a prime.

It is a super-2 number, since 2×25612327291² (a number of 22 digits) contains 22 as substring.

Together with 25612327289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25612327261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12806163645 + 12806163646.

It is an arithmetic number, because the mean of its divisors is an integer number (12806163646).

Almost surely, 2^25612327291 is an apocalyptic number.

25612327291 is a deficient number, since it is larger than the sum of its proper divisors (1).

25612327291 is an equidigital number, since it uses as much as digits as its factorization.

25612327291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The spelling of 25612327291 in words is "twenty-five billion, six hundred twelve million, three hundred twenty-seven thousand, two hundred ninety-one".