25808368867 has 4 divisors (see below), whose sum is σ = 25866627480. Its totient is φ = 25750110256.

The previous prime is 25808368847. The next prime is 25808368903. The reversal of 25808368867 is 76886380852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25808368867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25808368847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29128642 + ... + 29129527.

It is an arithmetic number, because the mean of its divisors is an integer number (6466656870).

Almost surely, 2^25808368867 is an apocalyptic number.

25808368867 is a deficient number, since it is larger than the sum of its proper divisors (58258613).

25808368867 is an equidigital number, since it uses as much as digits as its factorization.

25808368867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58258612.

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 25808368867 in words is "twenty-five billion, eight hundred eight million, three hundred sixty-eight thousand, eight hundred sixty-seven".