26845831717 has 2 divisors, whose sum is σ = 26845831718. Its totient is φ = 26845831716.

The previous prime is 26845831697. The next prime is 26845831721. The reversal of 26845831717 is 71713854862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25329040801 + 1516790916 = 159151^2 + 38946^2 .

It is a cyclic number.

It is not a de Polignac number, because 26845831717 - 2¹⁵ = 26845798949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26845831787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13422915858 + 13422915859.

It is an arithmetic number, because the mean of its divisors is an integer number (13422915859).

Almost surely, 2^26845831717 is an apocalyptic number.

It is an amenable number.

26845831717 is a deficient number, since it is larger than the sum of its proper divisors (1).

26845831717 is an equidigital number, since it uses as much as digits as its factorization.

26845831717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 52.

The spelling of 26845831717 in words is "twenty-six billion, eight hundred forty-five million, eight hundred thirty-one thousand, seven hundred seventeen".