26634649193 has 2 divisors, whose sum is σ = 26634649194. Its totient is φ = 26634649192.

The previous prime is 26634649163. The next prime is 26634649199. The reversal of 26634649193 is 39194643662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26105511184 + 529138009 = 161572^2 + 23003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26634649193 is a prime.

It is not a weakly prime, because it can be changed into another prime (26634649199) 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, 13317324596 + 13317324597.

It is an arithmetic number, because the mean of its divisors is an integer number (13317324597).

Almost surely, 2^26634649193 is an apocalyptic number.

It is an amenable number.

26634649193 is a deficient number, since it is larger than the sum of its proper divisors (1).

26634649193 is an equidigital number, since it uses as much as digits as its factorization.

26634649193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 53.

The spelling of 26634649193 in words is "twenty-six billion, six hundred thirty-four million, six hundred forty-nine thousand, one hundred ninety-three".