26685665781955 has 16 divisors (see below), whose sum is σ = 32353334080704. Its totient is φ = 21128181350400.

The previous prime is 26685665781941. The next prime is 26685665781979. The reversal of 26685665781955 is 55918756658662.

It is not a de Polignac number, because 26685665781955 - 2⁹ = 26685665781443 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 44712034 + ... + 45304936.

It is an arithmetic number, because the mean of its divisors is an integer number (2022083380044).

Almost surely, 2^{26685665781955} is an apocalyptic number.

26685665781955 is a deficient number, since it is larger than the sum of its proper divisors (5667668298749).

26685665781955 is an equidigital number, since it uses as much as digits as its factorization.

26685665781955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685806.

The product of its digits is 6531840000, while the sum is 79.

The spelling of 26685665781955 in words is "twenty-six trillion, six hundred eighty-five billion, six hundred sixty-five million, seven hundred eighty-one thousand, nine hundred fifty-five".