26705864761 has 2 divisors, whose sum is σ = 26705864762. Its totient is φ = 26705864760.

The previous prime is 26705864749. The next prime is 26705864767. The reversal of 26705864761 is 16746850762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14796289600 + 11909575161 = 121640^2 + 109131^2 .

It is a cyclic number.

It is not a de Polignac number, because 26705864761 - 2⁵ = 26705864729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26705864699 and 26705864708.

It is not a weakly prime, because it can be changed into another prime (26705864767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13352932380 + 13352932381.

It is an arithmetic number, because the mean of its divisors is an integer number (13352932381).

Almost surely, 2^26705864761 is an apocalyptic number.

It is an amenable number.

26705864761 is a deficient number, since it is larger than the sum of its proper divisors (1).

26705864761 is an equidigital number, since it uses as much as digits as its factorization.

26705864761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 26705864761 in words is "twenty-six billion, seven hundred five million, eight hundred sixty-four thousand, seven hundred sixty-one".