25605170579 has 2 divisors, whose sum is σ = 25605170580. Its totient is φ = 25605170578.

The previous prime is 25605170543. The next prime is 25605170581. The reversal of 25605170579 is 97507150652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25605170579 - 2⁸ = 25605170323 is a prime.

Together with 25605170581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25605170779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12802585289 + 12802585290.

It is an arithmetic number, because the mean of its divisors is an integer number (12802585290).

Almost surely, 2^25605170579 is an apocalyptic number.

25605170579 is a deficient number, since it is larger than the sum of its proper divisors (1).

25605170579 is an equidigital number, since it uses as much as digits as its factorization.

25605170579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 661500, while the sum is 47.

The spelling of 25605170579 in words is "twenty-five billion, six hundred five million, one hundred seventy thousand, five hundred seventy-nine".