25817879587 has 2 divisors, whose sum is σ = 25817879588. Its totient is φ = 25817879586.

The previous prime is 25817879551. The next prime is 25817879741. The reversal of 25817879587 is 78597871852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25817879587 - 2¹⁵ = 25817846819 is a prime.

It is not a weakly prime, because it can be changed into another prime (25817874587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12908939793 + 12908939794.

It is an arithmetic number, because the mean of its divisors is an integer number (12908939794).

Almost surely, 2^25817879587 is an apocalyptic number.

25817879587 is a deficient number, since it is larger than the sum of its proper divisors (1).

25817879587 is an equidigital number, since it uses as much as digits as its factorization.

25817879587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79027200, while the sum is 67.

The spelling of 25817879587 in words is "twenty-five billion, eight hundred seventeen million, eight hundred seventy-nine thousand, five hundred eighty-seven".