26808379819 has 4 divisors (see below), whose sum is σ = 28870562896. Its totient is φ = 24746196744.

The previous prime is 26808379817. The next prime is 26808379831. The reversal of 26808379819 is 91897380862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26808379819 - 2¹ = 26808379817 is a prime.

It is a super-2 number, since 2×26808379819² (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 (26808379817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031091519 + ... + 1031091544.

It is an arithmetic number, because the mean of its divisors is an integer number (7217640724).

Almost surely, 2^26808379819 is an apocalyptic number.

26808379819 is a deficient number, since it is larger than the sum of its proper divisors (2062183077).

26808379819 is a wasteful number, since it uses less digits than its factorization.

26808379819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062183076.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 26808379819 in words is "twenty-six billion, eight hundred eight million, three hundred seventy-nine thousand, eight hundred nineteen".