27723889971 has 6 divisors (see below), whose sum is σ = 40045618860. Its totient is φ = 18482593308.

The previous prime is 27723889943. The next prime is 27723889979. The reversal of 27723889971 is 17998832772.

It is not a de Polignac number, because 27723889971 - 2¹¹ = 27723887923 is a prime.

It is a super-3 number, since 3×27723889971³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 27723889899 and 27723889908.

It is not an unprimeable number, because it can be changed into a prime (27723889979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1540216101 + ... + 1540216118.

It is an arithmetic number, because the mean of its divisors is an integer number (6674269810).

Almost surely, 2^27723889971 is an apocalyptic number.

27723889971 is a deficient number, since it is larger than the sum of its proper divisors (12321728889).

27723889971 is a wasteful number, since it uses less digits than its factorization.

27723889971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080432225 (or 3080432222 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 63.

The spelling of 27723889971 in words is "twenty-seven billion, seven hundred twenty-three million, eight hundred eighty-nine thousand, nine hundred seventy-one".