26718191079 has 4 divisors (see below), whose sum is σ = 35624254776. Its totient is φ = 17812127384.

The previous prime is 26718191021. The next prime is 26718191099. The reversal of 26718191079 is 97019181762.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 26718191079 - 2²⁰ = 26717142503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26718191009) 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, 4453031844 + ... + 4453031849.

It is an arithmetic number, because the mean of its divisors is an integer number (8906063694).

Almost surely, 2^26718191079 is an apocalyptic number.

26718191079 is a deficient number, since it is larger than the sum of its proper divisors (8906063697).

26718191079 is an equidigital number, since it uses as much as digits as its factorization.

26718191079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8906063696.

The product of its (nonzero) digits is 381024, while the sum is 51.

The spelling of 26718191079 in words is "twenty-six billion, seven hundred eighteen million, one hundred ninety-one thousand, seventy-nine".