26143284681 has 10 divisors (see below), whose sum is σ = 39053548842. Its totient is φ = 17428856400.

The previous prime is 26143284659. The next prime is 26143284701. The reversal of 26143284681 is 18648234162.

26143284681 is a `hidden beast` number, since 2 + 61 + 432 + 84 + 6 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26142039225 + 1245456 = 161685^2 + 1116^2 .

It is not a de Polignac number, because 26143284681 - 2⁷ = 26143284553 is a prime.

It is a super-2 number, since 2×26143284681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26143284481) 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 9 ways as a sum of consecutive naturals, for example, 161378220 + ... + 161378381.

Almost surely, 2^26143284681 is an apocalyptic number.

It is an amenable number.

26143284681 is a deficient number, since it is larger than the sum of its proper divisors (12910264161).

26143284681 is an equidigital number, since it uses as much as digits as its factorization.

26143284681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322756613 (or 322756604 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The spelling of 26143284681 in words is "twenty-six billion, one hundred forty-three million, two hundred eighty-four thousand, six hundred eighty-one".