25257396688 has 10 divisors (see below), whose sum is σ = 48936206114. Its totient is φ = 12628698336.

The previous prime is 25257396683. The next prime is 25257396707. The reversal of 25257396688 is 88669375252.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18455765904 + 6801630784 = 135852^2 + 82472^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25257396683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789293631 + ... + 789293662.

Almost surely, 2^25257396688 is an apocalyptic number.

It is an amenable number.

25257396688 is a deficient number, since it is larger than the sum of its proper divisors (23678809426).

25257396688 is a wasteful number, since it uses less digits than its factorization.

25257396688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578587301 (or 1578587295 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 61.

The spelling of 25257396688 in words is "twenty-five billion, two hundred fifty-seven million, three hundred ninety-six thousand, six hundred eighty-eight".