25518514279 has 2 divisors, whose sum is σ = 25518514280. Its totient is φ = 25518514278.

The previous prime is 25518514261. The next prime is 25518514321. The reversal of 25518514279 is 97241581552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25518514279 - 2⁵ = 25518514247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25518514079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12759257139 + 12759257140.

It is an arithmetic number, because the mean of its divisors is an integer number (12759257140).

Almost surely, 2^25518514279 is an apocalyptic number.

25518514279 is a deficient number, since it is larger than the sum of its proper divisors (1).

25518514279 is an equidigital number, since it uses as much as digits as its factorization.

25518514279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 49.

The spelling of 25518514279 in words is "twenty-five billion, five hundred eighteen million, five hundred fourteen thousand, two hundred seventy-nine".