25579388539 has 2 divisors, whose sum is σ = 25579388540. Its totient is φ = 25579388538.

The previous prime is 25579388531. The next prime is 25579388603. The reversal of 25579388539 is 93588397552.

It is an a-pointer prime, because the next prime (25579388603) can be obtained adding 25579388539 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25579388539 - 2³ = 25579388531 is a prime.

It is not a weakly prime, because it can be changed into another prime (25579388531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12789694269 + 12789694270.

It is an arithmetic number, because the mean of its divisors is an integer number (12789694270).

Almost surely, 2^25579388539 is an apocalyptic number.

25579388539 is a deficient number, since it is larger than the sum of its proper divisors (1).

25579388539 is an equidigital number, since it uses as much as digits as its factorization.

25579388539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648000, while the sum is 64.

The spelling of 25579388539 in words is "twenty-five billion, five hundred seventy-nine million, three hundred eighty-eight thousand, five hundred thirty-nine".