26997723811 has 12 divisors (see below), whose sum is σ = 27211907880. Its totient is φ = 26785160960.

The previous prime is 26997723791. The next prime is 26997723833. The reversal of 26997723811 is 11832779962.

It is a happy number.

It is not a de Polignac number, because 26997723811 - 2¹¹ = 26997721763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26997763811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27803556 + ... + 27804526.

It is an arithmetic number, because the mean of its divisors is an integer number (2267658990).

Almost surely, 2^26997723811 is an apocalyptic number.

26997723811 is a deficient number, since it is larger than the sum of its proper divisors (214184069).

26997723811 is an frugal number, since it uses more digits than its factorization.

26997723811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246 (or 2073 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The spelling of 26997723811 in words is "twenty-six billion, nine hundred ninety-seven million, seven hundred twenty-three thousand, eight hundred eleven".