26269684681 has 4 divisors (see below), whose sum is σ = 26378687764. Its totient is φ = 26160681600.

The previous prime is 26269684633. The next prime is 26269684691. The reversal of 26269684681 is 18648696262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13442083600 + 12827601081 = 115940^2 + 113259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26269684681 is a prime.

It is a super-2 number, since 2×26269684681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26269684691) 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 3 ways as a sum of consecutive naturals, for example, 54501180 + ... + 54501661.

It is an arithmetic number, because the mean of its divisors is an integer number (6594671941).

Almost surely, 2^26269684681 is an apocalyptic number.

It is an amenable number.

26269684681 is a deficient number, since it is larger than the sum of its proper divisors (109003083).

26269684681 is a wasteful number, since it uses less digits than its factorization.

26269684681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109003082.

The product of its digits is 11943936, while the sum is 58.

The spelling of 26269684681 in words is "twenty-six billion, two hundred sixty-nine million, six hundred eighty-four thousand, six hundred eighty-one".