25909824539 has 2 divisors, whose sum is σ = 25909824540. Its totient is φ = 25909824538.

The previous prime is 25909824511. The next prime is 25909824587. The reversal of 25909824539 is 93542890952.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25909824539 is a prime.

It is not a weakly prime, because it can be changed into another prime (25909827539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12954912269 + 12954912270.

It is an arithmetic number, because the mean of its divisors is an integer number (12954912270).

Almost surely, 2^25909824539 is an apocalyptic number.

25909824539 is a deficient number, since it is larger than the sum of its proper divisors (1).

25909824539 is an equidigital number, since it uses as much as digits as its factorization.

25909824539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 25909824539 in words is "twenty-five billion, nine hundred nine million, eight hundred twenty-four thousand, five hundred thirty-nine".