26423477809 has 3 divisors (see below), whose sum is σ = 26423640363. Its totient is φ = 26423315256.

The previous prime is 26423477807. The next prime is 26423477869. The reversal of 26423477809 is 90877432462.

The square root of 26423477809 is 162553.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 26329930225 + 93547584 = 162265^2 + 9672^2 .

It is not a de Polignac number, because 26423477809 - 2¹ = 26423477807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26423477807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 81277 + ... + 243829.

It is an arithmetic number, because the mean of its divisors is an integer number (8807880121).

Almost surely, 2^26423477809 is an apocalyptic number.

26423477809 is the 162553-rd square number.

26423477809 is the 81277-th centered octagonal number.

It is an amenable number.

26423477809 is a deficient number, since it is larger than the sum of its proper divisors (162554).

26423477809 is an frugal number, since it uses more digits than its factorization.

26423477809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325106 (or 162553 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 26423477809 in words is "twenty-six billion, four hundred twenty-three million, four hundred seventy-seven thousand, eight hundred nine".