26856735769 has 2 divisors, whose sum is σ = 26856735770. Its totient is φ = 26856735768.

The previous prime is 26856735757. The next prime is 26856735797. The reversal of 26856735769 is 96753765862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24035851225 + 2820884544 = 155035^2 + 53112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26856735769 is a prime.

It is a super-2 number, since 2×26856735769² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26856735769.

It is not a weakly prime, because it can be changed into another prime (26856735709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13428367884 + 13428367885.

It is an arithmetic number, because the mean of its divisors is an integer number (13428367885).

Almost surely, 2^26856735769 is an apocalyptic number.

It is an amenable number.

26856735769 is a deficient number, since it is larger than the sum of its proper divisors (1).

26856735769 is an equidigital number, since it uses as much as digits as its factorization.

26856735769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 64.

The spelling of 26856735769 in words is "twenty-six billion, eight hundred fifty-six million, seven hundred thirty-five thousand, seven hundred sixty-nine".