1986516789218 has 128 divisors (see below), whose sum is σ = 3469713408000. Its totient is φ = 845362552320.

The previous prime is 1986516789217. The next prime is 1986516789221. The reversal of 1986516789218 is 8129876156891.

It is not an unprimeable number, because it can be changed into a prime (1986516789217) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1496997671 + ... + 1496998997.

It is an arithmetic number, because the mean of its divisors is an integer number (27107136000).

Almost surely, 2^{1986516789218} is an apocalyptic number.

1986516789218 is a deficient number, since it is larger than the sum of its proper divisors (1483196618782).

1986516789218 is a wasteful number, since it uses less digits than its factorization.

1986516789218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960.

The product of its digits is 104509440, while the sum is 71.

The spelling of 1986516789218 in words is "one trillion, nine hundred eighty-six billion, five hundred sixteen million, seven hundred eighty-nine thousand, two hundred eighteen".