26188479497 has 2 divisors, whose sum is σ = 26188479498. Its totient is φ = 26188479496.

The previous prime is 26188479469. The next prime is 26188479509. The reversal of 26188479497 is 79497488162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20140151056 + 6048328441 = 141916^2 + 77771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26188479497 is a prime.

It is not a weakly prime, because it can be changed into another prime (26188479997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13094239748 + 13094239749.

It is an arithmetic number, because the mean of its divisors is an integer number (13094239749).

Almost surely, 2^26188479497 is an apocalyptic number.

It is an amenable number.

26188479497 is a deficient number, since it is larger than the sum of its proper divisors (1).

26188479497 is an equidigital number, since it uses as much as digits as its factorization.

26188479497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 65.

The spelling of 26188479497 in words is "twenty-six billion, one hundred eighty-eight million, four hundred seventy-nine thousand, four hundred ninety-seven".