26191214569 has 27 divisors (see below), whose sum is σ = 28987118199. Its totient is φ = 23654095920.

The previous prime is 26191214507. The next prime is 26191214593. The reversal of 26191214569 is 96541219162.

The square root of 26191214569 is 161837.

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

It can be written as a sum of positive squares in only one way, i.e., 3874440025 + 22316774544 = 62245^2 + 149388^2 .

It is not a de Polignac number, because 26191214569 - 2⁹ = 26191214057 is a prime.

It is a super-2 number, since 2×26191214569² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26191214669) 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 26 ways as a sum of consecutive naturals, for example, 124128874 + ... + 124129084.

Almost surely, 2^26191214569 is an apocalyptic number.

26191214569 is the 161837-th square number.

26191214569 is the 80919-th centered octagonal number.

It is an amenable number.

26191214569 is a deficient number, since it is larger than the sum of its proper divisors (2795903630).

26191214569 is an frugal number, since it uses more digits than its factorization.

26191214569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 283 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The spelling of 26191214569 in words is "twenty-six billion, one hundred ninety-one million, two hundred fourteen thousand, five hundred sixty-nine".