27687907986 has 16 divisors (see below), whose sum is σ = 56202321504. Its totient is φ = 9091551744.

The previous prime is 27687907981. The next prime is 27687908011. The reversal of 27687907986 is 68970978672.

It is a self number, because there is not a number n which added to its sum of digits gives 27687907986.

It is not an unprimeable number, because it can be changed into a prime (27687907981) 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, 34437295 + ... + 34438098.

It is an arithmetic number, because the mean of its divisors is an integer number (3512645094).

Almost surely, 2^27687907986 is an apocalyptic number.

27687907986 is an abundant number, since it is smaller than the sum of its proper divisors (28514413518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27687907986 is a wasteful number, since it uses less digits than its factorization.

27687907986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68875465.

The product of its (nonzero) digits is 128024064, while the sum is 69.

The spelling of 27687907986 in words is "twenty-seven billion, six hundred eighty-seven million, nine hundred seven thousand, nine hundred eighty-six".