26330880581 has 4 divisors (see below), whose sum is σ = 26352411552. Its totient is φ = 26309349612.

The previous prime is 26330880553. The next prime is 26330880683. The reversal of 26330880581 is 18508803362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26330880581 - 2²² = 26326686277 is a prime.

It is a super-2 number, since 2×26330880581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26330883581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10763651 + ... + 10766096.

It is an arithmetic number, because the mean of its divisors is an integer number (6588102888).

Almost surely, 2^26330880581 is an apocalyptic number.

It is an amenable number.

26330880581 is a deficient number, since it is larger than the sum of its proper divisors (21530971).

26330880581 is a wasteful number, since it uses less digits than its factorization.

26330880581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21530970.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 26330880581 in words is "twenty-six billion, three hundred thirty million, eight hundred eighty thousand, five hundred eighty-one".