27939783969 has 6 divisors (see below), whose sum is σ = 40357465746. Its totient is φ = 18626522640.

The previous prime is 27939783941. The next prime is 27939783979. The reversal of 27939783969 is 96938793972.

27939783969 is a `hidden beast` number, since 2 + 79 + 397 + 83 + 96 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20254982400 + 7684801569 = 142320^2 + 87663^2 .

It is not a de Polignac number, because 27939783969 - 2¹² = 27939779873 is a prime.

It is a super-2 number, since 2×27939783969² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27939783897 and 27939783906.

It is not an unprimeable number, because it can be changed into a prime (27939783979) 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, 1552210212 + ... + 1552210229.

It is an arithmetic number, because the mean of its divisors is an integer number (6726244291).

Almost surely, 2^27939783969 is an apocalyptic number.

It is an amenable number.

27939783969 is a deficient number, since it is larger than the sum of its proper divisors (12417681777).

27939783969 is a wasteful number, since it uses less digits than its factorization.

27939783969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104420447 (or 3104420444 counting only the distinct ones).

The product of its digits is 277766496, while the sum is 72.

The spelling of 27939783969 in words is "twenty-seven billion, nine hundred thirty-nine million, seven hundred eighty-three thousand, nine hundred sixty-nine".