26936517493849 has 2 divisors, whose sum is σ = 26936517493850. Its totient is φ = 26936517493848.

The previous prime is 26936517493843. The next prime is 26936517493883. The reversal of 26936517493849 is 94839471563962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16143978453849 + 10792539040000 = 4017957^2 + 3285200^2 .

It is a cyclic number.

It is not a de Polignac number, because 26936517493849 - 2³ = 26936517493841 is a prime.

It is not a weakly prime, because it can be changed into another prime (26936517493841) by changing a digit.

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 as a sum of consecutive naturals, namely, 13468258746924 + 13468258746925.

It is an arithmetic number, because the mean of its divisors is an integer number (13468258746925).

Almost surely, 2^{26936517493849} is an apocalyptic number.

It is an amenable number.

26936517493849 is a deficient number, since it is larger than the sum of its proper divisors (1).

26936517493849 is an equidigital number, since it uses as much as digits as its factorization.

26936517493849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116316160, while the sum is 76.

The spelling of 26936517493849 in words is "twenty-six trillion, nine hundred thirty-six billion, five hundred seventeen million, four hundred ninety-three thousand, eight hundred forty-nine".