26887188458125 has 20 divisors (see below), whose sum is σ = 33600410848620. Its totient is φ = 21508355024000.

The previous prime is 26887188458107. The next prime is 26887188458129. The reversal of 26887188458125 is 52185488178862.

It can be written as a sum of positive squares in 10 ways, for example, as 16697896725636 + 10189291732489 = 4086306^2 + 3192067^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26887188458125 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26887188458129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8297631 + ... + 11073619.

It is an arithmetic number, because the mean of its divisors is an integer number (1680020542431).

Almost surely, 2^{26887188458125} is an apocalyptic number.

26887188458125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26887188458125 is a deficient number, since it is larger than the sum of its proper divisors (6713222390495).

26887188458125 is an equidigital number, since it uses as much as digits as its factorization.

26887188458125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791506 (or 2791491 counting only the distinct ones).

The product of its digits is 550502400, while the sum is 73.

The spelling of 26887188458125 in words is "twenty-six trillion, eight hundred eighty-seven billion, one hundred eighty-eight million, four hundred fifty-eight thousand, one hundred twenty-five".