25681562478136 has 16 divisors (see below), whose sum is σ = 48152992649040. Its totient is φ = 12840764438400.

The previous prime is 25681562478127. The next prime is 25681562478151. The reversal of 25681562478136 is 63187426518652.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6438736 + ... + 9634336.

It is an arithmetic number, because the mean of its divisors is an integer number (3009562040565).

Almost surely, 2^{25681562478136} is an apocalyptic number.

It is an amenable number.

25681562478136 is a deficient number, since it is larger than the sum of its proper divisors (22471430170904).

25681562478136 is a wasteful number, since it uses less digits than its factorization.

25681562478136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200174 (or 4200170 counting only the distinct ones).

The product of its digits is 116121600, while the sum is 64.

The spelling of 25681562478136 in words is "twenty-five trillion, six hundred eighty-one billion, five hundred sixty-two million, four hundred seventy-eight thousand, one hundred thirty-six".