27868909685 has 8 divisors (see below), whose sum is σ = 33444041400. Its totient is φ = 22294227904.

The previous prime is 27868909681. The next prime is 27868909741. The reversal of 27868909685 is 58690986872.

It can be written as a sum of positive squares in 4 ways, for example, as 2210316196 + 25658593489 = 47014^2 + 160183^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27868909685 - 2² = 27868909681 is a prime.

It is a super-2 number, since 2×27868909685² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27868909681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43439 + ... + 240051.

It is an arithmetic number, because the mean of its divisors is an integer number (4180505175).

Almost surely, 2^27868909685 is an apocalyptic number.

It is an amenable number.

27868909685 is a deficient number, since it is larger than the sum of its proper divisors (5575131715).

27868909685 is a wasteful number, since it uses less digits than its factorization.

27868909685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224967.

The product of its (nonzero) digits is 104509440, while the sum is 68.

The spelling of 27868909685 in words is "twenty-seven billion, eight hundred sixty-eight million, nine hundred nine thousand, six hundred eighty-five".