25156628889 has 16 divisors (see below), whose sum is σ = 38397926400. Its totient is φ = 14351210640.

The previous prime is 25156628851. The next prime is 25156628897. The reversal of 25156628889 is 98882665152.

It is a happy number.

It is not a de Polignac number, because 25156628889 - 2⁸ = 25156628633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25156628089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 987367 + ... + 1012524.

It is an arithmetic number, because the mean of its divisors is an integer number (2399870400).

Almost surely, 2^25156628889 is an apocalyptic number.

It is an amenable number.

25156628889 is a deficient number, since it is larger than the sum of its proper divisors (13241297511).

25156628889 is a wasteful number, since it uses less digits than its factorization.

25156628889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000500.

The product of its digits is 16588800, while the sum is 60.

The spelling of 25156628889 in words is "twenty-five billion, one hundred fifty-six million, six hundred twenty-eight thousand, eight hundred eighty-nine".