1986287655018 has 16 divisors (see below), whose sum is σ = 3996363188160. Its totient is φ = 658131238656.

The previous prime is 1986287654999. The next prime is 1986287655041. The reversal of 1986287655018 is 8105567826891.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1986287655018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991160503 + ... + 991162506.

It is an arithmetic number, because the mean of its divisors is an integer number (249772699260).

Almost surely, 2^{1986287655018} is an apocalyptic number.

1986287655018 is an abundant number, since it is smaller than the sum of its proper divisors (2010075533142).

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

1986287655018 is a wasteful number, since it uses less digits than its factorization.

1986287655018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982323181.

The product of its (nonzero) digits is 58060800, while the sum is 66.

The spelling of 1986287655018 in words is "one trillion, nine hundred eighty-six billion, two hundred eighty-seven million, six hundred fifty-five thousand, eighteen".