25855902167 has 4 divisors (see below), whose sum is σ = 25856236416. Its totient is φ = 25855567920.

The previous prime is 25855902161. The next prime is 25855902209. The reversal of 25855902167 is 76120955852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25855902167 - 2²² = 25851707863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25855902161) 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, 15242 + ... + 227912.

It is an arithmetic number, because the mean of its divisors is an integer number (6464059104).

Almost surely, 2^25855902167 is an apocalyptic number.

25855902167 is a deficient number, since it is larger than the sum of its proper divisors (334249).

25855902167 is a wasteful number, since it uses less digits than its factorization.

25855902167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334248.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 25855902167 in words is "twenty-five billion, eight hundred fifty-five million, nine hundred two thousand, one hundred sixty-seven".