25349962591 has 2 divisors, whose sum is σ = 25349962592. Its totient is φ = 25349962590.

The previous prime is 25349962579. The next prime is 25349962639. The reversal of 25349962591 is 19526994352.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25349962591 is a prime.

It is a super-3 number, since 3×25349962591³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25349962501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12674981295 + 12674981296.

It is an arithmetic number, because the mean of its divisors is an integer number (12674981296).

Almost surely, 2^25349962591 is an apocalyptic number.

25349962591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25349962591 is an equidigital number, since it uses as much as digits as its factorization.

25349962591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 55.

The spelling of 25349962591 in words is "twenty-five billion, three hundred forty-nine million, nine hundred sixty-two thousand, five hundred ninety-one".