27678361686835 has 16 divisors (see below), whose sum is σ = 35170084093536. Its totient is φ = 20838825107968.

The previous prime is 27678361686821. The next prime is 27678361686847. The reversal of 27678361686835 is 53868616387672.

It is a cyclic number.

It is not a de Polignac number, because 27678361686835 - 2¹⁹ = 27678361162547 is a prime.

It is a super-2 number, since 2×27678361686835² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9253309 + ... + 11873518.

It is an arithmetic number, because the mean of its divisors is an integer number (2198130255846).

Almost surely, 2^{27678361686835} is an apocalyptic number.

27678361686835 is a deficient number, since it is larger than the sum of its proper divisors (7491722406701).

27678361686835 is a wasteful number, since it uses less digits than its factorization.

27678361686835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21142262.

The product of its digits is 2926264320, while the sum is 76.

The spelling of 27678361686835 in words is "twenty-seven trillion, six hundred seventy-eight billion, three hundred sixty-one million, six hundred eighty-six thousand, eight hundred thirty-five".