25538836902198 has 64 divisors (see below), whose sum is σ = 56791064985600. Its totient is φ = 7623232354080.

The previous prime is 25538836902191. The next prime is 25538836902223. The reversal of 25538836902198 is 89120963883552.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25538836902191) 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 31 ways as a sum of consecutive naturals, for example, 83878378 + ... + 84182301.

It is an arithmetic number, because the mean of its divisors is an integer number (887360390400).

Almost surely, 2^{25538836902198} is an apocalyptic number.

25538836902198 is an abundant number, since it is smaller than the sum of its proper divisors (31252228083402).

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

25538836902198 is a wasteful number, since it uses less digits than its factorization.

25538836902198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168060777.

The product of its (nonzero) digits is 223948800, while the sum is 69.

The spelling of 25538836902198 in words is "twenty-five trillion, five hundred thirty-eight billion, eight hundred thirty-six million, nine hundred two thousand, one hundred ninety-eight".