26908137369 has 9 divisors (see below), whose sum is σ = 38868020373. Its totient is φ = 17938430172.

The previous prime is 26908137343. The next prime is 26908137379. The reversal of 26908137369 is 96373180962.

The square root of 26908137369 is 164037.

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

26908137369 is a `hidden beast` number, since 269 + 0 + 8 + 1 + 373 + 6 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 26908137369 - 2⁵ = 26908137337 is a prime.

It is a super-2 number, since 2×26908137369² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26908137379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 464772 + ... + 519450.

Almost surely, 2^26908137369 is an apocalyptic number.

26908137369 is the 164037-th square number.

26908137369 is the 82019-th centered octagonal number.

It is an amenable number.

26908137369 is a deficient number, since it is larger than the sum of its proper divisors (11959883004).

26908137369 is an frugal number, since it uses more digits than its factorization.

26908137369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109364 (or 54682 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 26908137369 in words is "twenty-six billion, nine hundred eight million, one hundred thirty-seven thousand, three hundred sixty-nine".