26865887003540 has 24 divisors (see below), whose sum is σ = 60758236762440. Its totient is φ = 9919712124288.

The previous prime is 26865887003497. The next prime is 26865887003563. The reversal of 26865887003540 is 4530078856862.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 145299717124 + 26720587286416 = 381182^2 + 5169196^2 .

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 7 ways as a sum of consecutive naturals, for example, 51665167055 + ... + 51665167574.

It is an arithmetic number, because the mean of its divisors is an integer number (2531593198435).

Almost surely, 2^{26865887003540} is an apocalyptic number.

26865887003540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26865887003540 is an abundant number, since it is smaller than the sum of its proper divisors (33892349758900).

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

26865887003540 is a wasteful number, since it uses less digits than its factorization.

26865887003540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103330334651 (or 103330334649 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 62.

The spelling of 26865887003540 in words is "twenty-six trillion, eight hundred sixty-five billion, eight hundred eighty-seven million, three thousand, five hundred forty".