26345804497 has 2 divisors, whose sum is σ = 26345804498. Its totient is φ = 26345804496.

The previous prime is 26345804489. The next prime is 26345804539. The reversal of 26345804497 is 79440854362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25946444241 + 399360256 = 161079^2 + 19984^2 .

It is a cyclic number.

It is not a de Polignac number, because 26345804497 - 2³ = 26345804489 is a prime.

It is not a weakly prime, because it can be changed into another prime (26345804447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13172902248 + 13172902249.

It is an arithmetic number, because the mean of its divisors is an integer number (13172902249).

Almost surely, 2^26345804497 is an apocalyptic number.

It is an amenable number.

26345804497 is a deficient number, since it is larger than the sum of its proper divisors (1).

26345804497 is an equidigital number, since it uses as much as digits as its factorization.

26345804497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 26345804497 in words is "twenty-six billion, three hundred forty-five million, eight hundred four thousand, four hundred ninety-seven".