26551809793 has 4 divisors (see below), whose sum is σ = 26647664980. Its totient is φ = 26455954608.

The previous prime is 26551809773. The next prime is 26551809803. The reversal of 26551809793 is 39790815562.

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 14453569729 + 12098240064 = 120223^2 + 109992^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26551809793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26551809773) 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 3 ways as a sum of consecutive naturals, for example, 47927178 + ... + 47927731.

It is an arithmetic number, because the mean of its divisors is an integer number (6661916245).

Almost surely, 2^26551809793 is an apocalyptic number.

It is an amenable number.

26551809793 is a deficient number, since it is larger than the sum of its proper divisors (95855187).

26551809793 is an equidigital number, since it uses as much as digits as its factorization.

26551809793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95855186.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 26551809793 in words is "twenty-six billion, five hundred fifty-one million, eight hundred nine thousand, seven hundred ninety-three".