26164033009 has 3 divisors (see below), whose sum is σ = 26164194763. Its totient is φ = 26163871256.

The previous prime is 26164032929. The next prime is 26164033037. The reversal of 26164033009 is 90033046162.

It is a happy number.

The square root of 26164033009 is 161753.

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., 3445103025 + 22718929984 = 58695^2 + 150728^2 .

It is not a de Polignac number, because 26164033009 - 2⁹ = 26164032497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26164033099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 80877 + ... + 242629.

Almost surely, 2^26164033009 is an apocalyptic number.

26164033009 is the 161753-rd square number.

26164033009 is the 80877-th centered octagonal number.

It is an amenable number.

26164033009 is a deficient number, since it is larger than the sum of its proper divisors (161754).

26164033009 is an frugal number, since it uses more digits than its factorization.

26164033009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323506 (or 161753 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 26164033009 in words is "twenty-six billion, one hundred sixty-four million, thirty-three thousand, nine".