25861072579 has 2 divisors, whose sum is σ = 25861072580. Its totient is φ = 25861072578.

The previous prime is 25861072553. The next prime is 25861072583. The reversal of 25861072579 is 97527016852.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25861072579 - 2²³ = 25852683971 is a prime.

It is a super-2 number, since 2×25861072579² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25861072079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12930536289 + 12930536290.

It is an arithmetic number, because the mean of its divisors is an integer number (12930536290).

Almost surely, 2^25861072579 is an apocalyptic number.

25861072579 is a deficient number, since it is larger than the sum of its proper divisors (1).

25861072579 is an equidigital number, since it uses as much as digits as its factorization.

25861072579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 25861072579 in words is "twenty-five billion, eight hundred sixty-one million, seventy-two thousand, five hundred seventy-nine".