26329201081 has 4 divisors (see below), whose sum is σ = 26329857012. Its totient is φ = 26328545152.

The previous prime is 26329201001. The next prime is 26329201097. The reversal of 26329201081 is 18010292362.

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 10098441081 + 16230760000 = 100491^2 + 127400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26329201081 is a prime.

It is a super-2 number, since 2×26329201081² (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 (26329201001) 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, 263536 + ... + 349441.

It is an arithmetic number, because the mean of its divisors is an integer number (6582464253).

Almost surely, 2^26329201081 is an apocalyptic number.

It is an amenable number.

26329201081 is a deficient number, since it is larger than the sum of its proper divisors (655931).

26329201081 is an equidigital number, since it uses as much as digits as its factorization.

26329201081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655930.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 26329201081 in words is "twenty-six billion, three hundred twenty-nine million, two hundred one thousand, eighty-one".