1968421188663 has 16 divisors (see below), whose sum is σ = 2916606965760. Its totient is φ = 1312088450328.

The previous prime is 1968421188647. The next prime is 1968421188707. The reversal of 1968421188663 is 3668811248691.

1968421188663 is a `hidden beast` number, since 1 + 9 + 68 + 421 + 18 + 86 + 63 = 666.

It is not a de Polignac number, because 1968421188663 - 2⁴ = 1968421188647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1968421188663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968421184663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5155095 + ... + 5523752.

It is an arithmetic number, because the mean of its divisors is an integer number (182287935360).

Almost surely, 2^{1968421188663} is an apocalyptic number.

1968421188663 is a deficient number, since it is larger than the sum of its proper divisors (948185777097).

1968421188663 is a wasteful number, since it uses less digits than its factorization.

1968421188663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685683 (or 10685677 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 63.

The spelling of 1968421188663 in words is "one trillion, nine hundred sixty-eight billion, four hundred twenty-one million, one hundred eighty-eight thousand, six hundred sixty-three".