25728889167 has 20 divisors (see below), whose sum is σ = 39159699480. Its totient is φ = 16828956144.

The previous prime is 25728889141. The next prime is 25728889187. The reversal of 25728889167 is 76198882752.

It is not a de Polignac number, because 25728889167 - 2⁶ = 25728889103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728889187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2992317 + ... + 3000902.

It is an arithmetic number, because the mean of its divisors is an integer number (1957984974).

Almost surely, 2^25728889167 is an apocalyptic number.

25728889167 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

25728889167 is a deficient number, since it is larger than the sum of its proper divisors (13430810313).

25728889167 is an equidigital number, since it uses as much as digits as its factorization.

25728889167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5993284 (or 5993275 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The spelling of 25728889167 in words is "twenty-five billion, seven hundred twenty-eight million, eight hundred eighty-nine thousand, one hundred sixty-seven".