25589406868 has 6 divisors (see below), whose sum is σ = 44781462026. Its totient is φ = 12794703432.

The previous prime is 25589406863. The next prime is 25589406901. The reversal of 25589406868 is 86860498552.

It can be written as a sum of positive squares in only one way, i.e., 25386686224 + 202720644 = 159332^2 + 14238^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25589406863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3198675855 + ... + 3198675862.

Almost surely, 2^25589406868 is an apocalyptic number.

It is an amenable number.

25589406868 is a deficient number, since it is larger than the sum of its proper divisors (19192055158).

25589406868 is a wasteful number, since it uses less digits than its factorization.

25589406868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397351721 (or 6397351719 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 61.

The spelling of 25589406868 in words is "twenty-five billion, five hundred eighty-nine million, four hundred six thousand, eight hundred sixty-eight".