26264315197 has 2 divisors, whose sum is σ = 26264315198. Its totient is φ = 26264315196.

The previous prime is 26264315191. The next prime is 26264315237. The reversal of 26264315197 is 79151346262.

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., 23236124356 + 3028190841 = 152434^2 + 55029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26264315197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26264315191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13132157598 + 13132157599.

It is an arithmetic number, because the mean of its divisors is an integer number (13132157599).

Almost surely, 2^26264315197 is an apocalyptic number.

It is an amenable number.

26264315197 is a deficient number, since it is larger than the sum of its proper divisors (1).

26264315197 is an equidigital number, since it uses as much as digits as its factorization.

26264315197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The spelling of 26264315197 in words is "twenty-six billion, two hundred sixty-four million, three hundred fifteen thousand, one hundred ninety-seven".