25606979029 has 2 divisors, whose sum is σ = 25606979030. Its totient is φ = 25606979028.

The previous prime is 25606979009. The next prime is 25606979077. The reversal of 25606979029 is 92097960652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24343176529 + 1263802500 = 156023^2 + 35550^2 .

It is a cyclic number.

It is not a de Polignac number, because 25606979029 - 2⁵ = 25606978997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25606979009) 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, 12803489514 + 12803489515.

It is an arithmetic number, because the mean of its divisors is an integer number (12803489515).

Almost surely, 2^25606979029 is an apocalyptic number.

It is an amenable number.

25606979029 is a deficient number, since it is larger than the sum of its proper divisors (1).

25606979029 is an equidigital number, since it uses as much as digits as its factorization.

25606979029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 25606979029 in words is "twenty-five billion, six hundred six million, nine hundred seventy-nine thousand, twenty-nine".