68189819699 has 4 divisors (see below), whose sum is σ = 68233560720. Its totient is φ = 68146078680.

The previous prime is 68189819681. The next prime is 68189819741. The reversal of 68189819699 is 99691898186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68189819699 - 2¹⁶ = 68189754163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68189819609) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21868172 + ... + 21871289.

It is an arithmetic number, because the mean of its divisors is an integer number (17058390180).

Almost surely, 2^68189819699 is an apocalyptic number.

68189819699 is a deficient number, since it is larger than the sum of its proper divisors (43741021).

68189819699 is a wasteful number, since it uses less digits than its factorization.

68189819699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43741020.

The product of its digits is 120932352, while the sum is 74.

The spelling of 68189819699 in words is "sixty-eight billion, one hundred eighty-nine million, eight hundred nineteen thousand, six hundred ninety-nine".