27912987639868 has 12 divisors (see below), whose sum is σ = 51721124156352. Its totient is φ = 13135523595200.

The previous prime is 27912987639847. The next prime is 27912987639883. The reversal of 27912987639868 is 86893678921972.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205242556108 + ... + 205242556243.

It is an arithmetic number, because the mean of its divisors is an integer number (4310093679696).

Almost surely, 2^{27912987639868} is an apocalyptic number.

It is an amenable number.

27912987639868 is a deficient number, since it is larger than the sum of its proper divisors (23808136516484).

27912987639868 is a wasteful number, since it uses less digits than its factorization.

27912987639868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410485112372 (or 410485112370 counting only the distinct ones).

The product of its digits is 7900913664, while the sum is 85.

The spelling of 27912987639868 in words is "twenty-seven trillion, nine hundred twelve billion, nine hundred eighty-seven million, six hundred thirty-nine thousand, eight hundred sixty-eight".