25328889017 has 4 divisors (see below), whose sum is σ = 25528329216. Its totient is φ = 25129448820.

The previous prime is 25328889013. The next prime is 25328889041. The reversal of 25328889017 is 71098882352.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25328889017 - 2² = 25328889013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25328889017.

It is not an unprimeable number, because it can be changed into a prime (25328889011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99719909 + ... + 99720162.

It is an arithmetic number, because the mean of its divisors is an integer number (6382082304).

Almost surely, 2^25328889017 is an apocalyptic number.

It is an amenable number.

25328889017 is a deficient number, since it is larger than the sum of its proper divisors (199440199).

25328889017 is a wasteful number, since it uses less digits than its factorization.

25328889017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199440198.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 25328889017 in words is "twenty-five billion, three hundred twenty-eight million, eight hundred eighty-nine thousand, seventeen".