26981708791 has 2 divisors, whose sum is σ = 26981708792. Its totient is φ = 26981708790.

The previous prime is 26981708783. The next prime is 26981708813. The reversal of 26981708791 is 19780718962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26981708791 - 2³ = 26981708783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26981700791) 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 as a sum of consecutive naturals, namely, 13490854395 + 13490854396.

It is an arithmetic number, because the mean of its divisors is an integer number (13490854396).

Almost surely, 2^26981708791 is an apocalyptic number.

26981708791 is a deficient number, since it is larger than the sum of its proper divisors (1).

26981708791 is an equidigital number, since it uses as much as digits as its factorization.

26981708791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 58.

The spelling of 26981708791 in words is "twenty-six billion, nine hundred eighty-one million, seven hundred eight thousand, seven hundred ninety-one".