1998001876186 has 16 divisors (see below), whose sum is σ = 3015504817344. Its totient is φ = 992834073504.

The previous prime is 1998001876153. The next prime is 1998001876201. The reversal of 1998001876186 is 6816781008991.

It is a happy number.

It is a super-2 number, since 2×1998001876186² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9653806 + ... + 9858598.

It is an arithmetic number, because the mean of its divisors is an integer number (188469051084).

Almost surely, 2^{1998001876186} is an apocalyptic number.

1998001876186 is a deficient number, since it is larger than the sum of its proper divisors (1017502941158).

1998001876186 is a wasteful number, since it uses less digits than its factorization.

1998001876186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234885.

The product of its (nonzero) digits is 10450944, while the sum is 64.

The spelling of 1998001876186 in words is "one trillion, nine hundred ninety-eight billion, one million, eight hundred seventy-six thousand, one hundred eighty-six".