27912987639867 has 8 divisors (see below), whose sum is σ = 40600709294400. Its totient is φ = 16916962205960.

The previous prime is 27912987639847. The next prime is 27912987639883. The reversal of 27912987639867 is 76893678921972.

It is a happy number.

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 27912987639867 - 2²⁶ = 27912920531003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27912987639867.

It is not an unprimeable number, because it can be changed into a prime (27912987639847) 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, 422924055117 + ... + 422924055182.

It is an arithmetic number, because the mean of its divisors is an integer number (5075088661800).

Almost surely, 2^{27912987639867} is an apocalyptic number.

27912987639867 is a deficient number, since it is larger than the sum of its proper divisors (12687721654533).

27912987639867 is a wasteful number, since it uses less digits than its factorization.

27912987639867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845848110313.

The product of its digits is 6913299456, while the sum is 84.

The spelling of 27912987639867 in words is "twenty-seven trillion, nine hundred twelve billion, nine hundred eighty-seven million, six hundred thirty-nine thousand, eight hundred sixty-seven".