26818436797 has 2 divisors, whose sum is σ = 26818436798. Its totient is φ = 26818436796.

The previous prime is 26818436791. The next prime is 26818436857. The reversal of 26818436797 is 79763481862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15763806916 + 11054629881 = 125554^2 + 105141^2 .

It is a cyclic number.

It is not a de Polignac number, because 26818436797 - 2³ = 26818436789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26818436791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13409218398 + 13409218399.

It is an arithmetic number, because the mean of its divisors is an integer number (13409218399).

Almost surely, 2^26818436797 is an apocalyptic number.

It is an amenable number.

26818436797 is a deficient number, since it is larger than the sum of its proper divisors (1).

26818436797 is an equidigital number, since it uses as much as digits as its factorization.

26818436797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 61.

The spelling of 26818436797 in words is "twenty-six billion, eight hundred eighteen million, four hundred thirty-six thousand, seven hundred ninety-seven".