26277281197 has 2 divisors, whose sum is σ = 26277281198. Its totient is φ = 26277281196.

The previous prime is 26277281179. The next prime is 26277281203. The reversal of 26277281197 is 79118277262.

Together with previous prime (26277281179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23675669161 + 2601612036 = 153869^2 + 51006^2 .

It is a cyclic number.

It is not a de Polignac number, because 26277281197 - 2²³ = 26268892589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26277281117) 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, 13138640598 + 13138640599.

It is an arithmetic number, because the mean of its divisors is an integer number (13138640599).

Almost surely, 2^26277281197 is an apocalyptic number.

It is an amenable number.

26277281197 is a deficient number, since it is larger than the sum of its proper divisors (1).

26277281197 is an equidigital number, since it uses as much as digits as its factorization.

26277281197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 52.

The spelling of 26277281197 in words is "twenty-six billion, two hundred seventy-seven million, two hundred eighty-one thousand, one hundred ninety-seven".