26616943609 has 3 divisors (see below), whose sum is σ = 26617106757. Its totient is φ = 26616780462.

The previous prime is 26616943579. The next prime is 26616943621. The reversal of 26616943609 is 90634961662.

The square root of 26616943609 is 163147.

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 is a de Polignac number, because none of the positive numbers 2^k-26616943609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26616943669) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 81574 + ... + 244720.

It is an arithmetic number, because the mean of its divisors is an integer number (8872368919).

Almost surely, 2^26616943609 is an apocalyptic number.

26616943609 is the 163147-th square number.

26616943609 is the 81574-th centered octagonal number.

It is an amenable number.

26616943609 is a deficient number, since it is larger than the sum of its proper divisors (163148).

26616943609 is an frugal number, since it uses more digits than its factorization.

26616943609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326294 (or 163147 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 52.

It can be divided in two parts, 26616 and 943609, that added together give a square (970225 = 985²).

The spelling of 26616943609 in words is "twenty-six billion, six hundred sixteen million, nine hundred forty-three thousand, six hundred nine".