26765320819 has 4 divisors (see below), whose sum is σ = 26769530944. Its totient is φ = 26761110696.

The previous prime is 26765320793. The next prime is 26765320847. The reversal of 26765320819 is 91802356762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91802356762 = 2 ⋅45901178381.

It is a cyclic number.

It is not a de Polignac number, because 26765320819 - 2¹¹ = 26765318771 is a prime.

It is a super-2 number, since 2×26765320819² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26765320019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095512 + ... + 2108245.

It is an arithmetic number, because the mean of its divisors is an integer number (6692382736).

Almost surely, 2^26765320819 is an apocalyptic number.

26765320819 is a deficient number, since it is larger than the sum of its proper divisors (4210125).

26765320819 is an equidigital number, since it uses as much as digits as its factorization.

26765320819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210124.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 26765320819 in words is "twenty-six billion, seven hundred sixty-five million, three hundred twenty thousand, eight hundred nineteen".