25866488899 has 2 divisors, whose sum is σ = 25866488900. Its totient is φ = 25866488898.

The previous prime is 25866488891. The next prime is 25866488917. The reversal of 25866488899 is 99888466852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25866488899 - 2³ = 25866488891 is a prime.

It is not a weakly prime, because it can be changed into another prime (25866488891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12933244449 + 12933244450.

It is an arithmetic number, because the mean of its divisors is an integer number (12933244450).

Almost surely, 2^25866488899 is an apocalyptic number.

25866488899 is a deficient number, since it is larger than the sum of its proper divisors (1).

25866488899 is an equidigital number, since it uses as much as digits as its factorization.

25866488899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 477757440, while the sum is 73.

The spelling of 25866488899 in words is "twenty-five billion, eight hundred sixty-six million, four hundred eighty-eight thousand, eight hundred ninety-nine".