25578167 has 2 divisors, whose sum is σ = 25578168. Its totient is φ = 25578166.

The previous prime is 25578151. The next prime is 25578169. The reversal of 25578167 is 76187552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25578167 - 2⁴ = 25578151 is a prime.

Together with 25578169, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1599764 and since 25578167 and 1599764 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25578169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12789083 + 12789084.

It is an arithmetic number, because the mean of its divisors is an integer number (12789084).

Almost surely, 2^25578167 is an apocalyptic number.

25578167 is a deficient number, since it is larger than the sum of its proper divisors (1).

25578167 is an equidigital number, since it uses as much as digits as its factorization.

25578167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 41.

The square root of 25578167 is about 5057.4862332981. The cubic root of 25578167 is about 294.6387112074.

The spelling of 25578167 in words is "twenty-five million, five hundred seventy-eight thousand, one hundred sixty-seven".