27805946123 has 4 divisors (see below), whose sum is σ = 27811706688. Its totient is φ = 27800185560.

The previous prime is 27805946111. The next prime is 27805946143. The reversal of 27805946123 is 32164950872.

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 27805946123 - 2⁶ = 27805946059 is a prime.

It is a super-2 number, since 2×27805946123² (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 (27805946143) 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, 2873036 + ... + 2882697.

It is an arithmetic number, because the mean of its divisors is an integer number (6952926672).

It is a 1-persistent number, because it is pandigital, but 2⋅27805946123 = 55611892246 is not.

Almost surely, 2^27805946123 is an apocalyptic number.

27805946123 is a deficient number, since it is larger than the sum of its proper divisors (5760565).

27805946123 is an equidigital number, since it uses as much as digits as its factorization.

27805946123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5760564.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 27805946123 in words is "twenty-seven billion, eight hundred five million, nine hundred forty-six thousand, one hundred twenty-three".