1986165623874 has 16 divisors (see below), whose sum is σ = 3974256784512. Its totient is φ = 661734285168.

The previous prime is 1986165623857. The next prime is 1986165623879. The reversal of 1986165623874 is 4783265616891.

It is not an unprimeable number, because it can be changed into a prime (1986165623879) 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, 80217289 + ... + 80242044.

It is an arithmetic number, because the mean of its divisors is an integer number (248391049032).

Almost surely, 2^{1986165623874} is an apocalyptic number.

1986165623874 is an abundant number, since it is smaller than the sum of its proper divisors (1988091160638).

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

1986165623874 is a wasteful number, since it uses less digits than its factorization.

1986165623874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160461401.

The product of its digits is 104509440, while the sum is 66.

The spelling of 1986165623874 in words is "one trillion, nine hundred eighty-six billion, one hundred sixty-five million, six hundred twenty-three thousand, eight hundred seventy-four".