26786217091 has 2 divisors, whose sum is σ = 26786217092. Its totient is φ = 26786217090.

The previous prime is 26786217079. The next prime is 26786217149. The reversal of 26786217091 is 19071268762.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26786217091 - 2⁹ = 26786216579 is a prime.

It is not a weakly prime, because it can be changed into another prime (26786217041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13393108545 + 13393108546.

It is an arithmetic number, because the mean of its divisors is an integer number (13393108546).

Almost surely, 2^26786217091 is an apocalyptic number.

26786217091 is a deficient number, since it is larger than the sum of its proper divisors (1).

26786217091 is an equidigital number, since it uses as much as digits as its factorization.

26786217091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 26786217091 in words is "twenty-six billion, seven hundred eighty-six million, two hundred seventeen thousand, ninety-one".