27789811123 has 4 divisors (see below), whose sum is σ = 27911164240. Its totient is φ = 27668458008.

The previous prime is 27789811087. The next prime is 27789811163. The reversal of 27789811123 is 32111898772.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27789811123 is a prime.

It is a super-2 number, since 2×27789811123² (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 (27789811163) 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, 60676215 + ... + 60676672.

It is an arithmetic number, because the mean of its divisors is an integer number (6977791060).

Almost surely, 2^27789811123 is an apocalyptic number.

27789811123 is a deficient number, since it is larger than the sum of its proper divisors (121353117).

27789811123 is a wasteful number, since it uses less digits than its factorization.

27789811123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121353116.

The product of its digits is 338688, while the sum is 49.

The spelling of 27789811123 in words is "twenty-seven billion, seven hundred eighty-nine million, eight hundred eleven thousand, one hundred twenty-three".