26775758689 has 3 divisors (see below), whose sum is σ = 26775922323. Its totient is φ = 26775595056.

The previous prime is 26775758677. The next prime is 26775758791. The reversal of 26775758689 is 98685757762.

The square root of 26775758689 is 163633.

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., 399400225 + 26376358464 = 19985^2 + 162408^2 .

It is not a de Polignac number, because 26775758689 - 2⁷ = 26775758561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26775755689) 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, 81817 + ... + 245449.

It is an arithmetic number, because the mean of its divisors is an integer number (8925307441).

Almost surely, 2^26775758689 is an apocalyptic number.

26775758689 is the 163633-rd square number.

26775758689 is the 81817-th centered octagonal number.

It is an amenable number.

26775758689 is a deficient number, since it is larger than the sum of its proper divisors (163634).

26775758689 is an frugal number, since it uses more digits than its factorization.

26775758689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327266 (or 163633 counting only the distinct ones).

The product of its digits is 355622400, while the sum is 70.

The spelling of 26775758689 in words is "twenty-six billion, seven hundred seventy-five million, seven hundred fifty-eight thousand, six hundred eighty-nine".