1986379798142 has 16 divisors (see below), whose sum is σ = 3077657856000. Its totient is φ = 960534950520.

The previous prime is 1986379798129. The next prime is 1986379798147. The reversal of 1986379798142 is 2418979736891.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1986379798142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986379798147) 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, 10178642 + ... + 10371957.

It is an arithmetic number, because the mean of its divisors is an integer number (192353616000).

Almost surely, 2^{1986379798142} is an apocalyptic number.

1986379798142 is a deficient number, since it is larger than the sum of its proper divisors (1091278057858).

1986379798142 is a wasteful number, since it uses less digits than its factorization.

1986379798142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20552191.

The product of its digits is 329204736, while the sum is 74.

The spelling of 1986379798142 in words is "one trillion, nine hundred eighty-six billion, three hundred seventy-nine million, seven hundred ninety-eight thousand, one hundred forty-two".