1916688191698 has 16 divisors (see below), whose sum is σ = 3330761477760. Its totient is φ = 810185223456.

The previous prime is 1916688191657. The next prime is 1916688191707. The reversal of 1916688191698 is 8961918866191.

It is a super-3 number, since 3×1916688191698³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a self number, because there is not a number n which added to its sum of digits gives 1916688191698.

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, 937713358 + ... + 937715401.

It is an arithmetic number, because the mean of its divisors is an integer number (208172592360).

Almost surely, 2^{1916688191698} is an apocalyptic number.

1916688191698 is a deficient number, since it is larger than the sum of its proper divisors (1414073286062).

1916688191698 is a wasteful number, since it uses less digits than its factorization.

1916688191698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875428841.

The product of its digits is 80621568, while the sum is 73.

The spelling of 1916688191698 in words is "one trillion, nine hundred sixteen billion, six hundred eighty-eight million, one hundred ninety-one thousand, six hundred ninety-eight".