25644118902138 has 24 divisors (see below), whose sum is σ = 60613371950976. Its totient is φ = 7770945121800.

The previous prime is 25644118902137. The next prime is 25644118902163. The reversal of 25644118902138 is 83120981144652.

25644118902138 is a `hidden beast` number, since 2 + 5 + 6 + 4 + 411 + 8 + 9 + 0 + 213 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (25644118902137) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 64757875818 + ... + 64757876213.

It is an arithmetic number, because the mean of its divisors is an integer number (2525557164624).

Almost surely, 2^{25644118902138} is an apocalyptic number.

25644118902138 is an abundant number, since it is smaller than the sum of its proper divisors (34969253048838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25644118902138 is a wasteful number, since it uses less digits than its factorization.

25644118902138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129515752050 (or 129515752047 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 25644118902138 in words is "twenty-five trillion, six hundred forty-four billion, one hundred eighteen million, nine hundred two thousand, one hundred thirty-eight".