26169209361 has 9 divisors (see below), whose sum is σ = 37800670089. Its totient is φ = 17445816036.

The previous prime is 26169209329. The next prime is 26169209431. The reversal of 26169209361 is 16390296162.

The square root of 26169209361 is 161769.

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

26169209361 is a `hidden beast` number, since 2 + 616 + 9 + 20 + 9 + 3 + 6 + 1 = 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 26169209361 - 2⁵ = 26169209329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26169209761) 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 8 ways as a sum of consecutive naturals, for example, 458346 + ... + 512268.

Almost surely, 2^26169209361 is an apocalyptic number.

26169209361 is the 161769-th square number.

26169209361 is the 80885-th centered octagonal number.

It is an amenable number.

26169209361 is a deficient number, since it is larger than the sum of its proper divisors (11631460728).

26169209361 is an frugal number, since it uses more digits than its factorization.

26169209361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107852 (or 53926 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 26169209361 in words is "twenty-six billion, one hundred sixty-nine million, two hundred nine thousand, three hundred sixty-one".