188819489819 has 2 divisors, whose sum is σ = 188819489820. Its totient is φ = 188819489818.

The previous prime is 188819489813. The next prime is 188819489827. The reversal of 188819489819 is 918984918881.

188819489819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188819489819 is a prime.

It is a super-2 number, since 2×188819489819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188819489813) 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 as a sum of consecutive naturals, namely, 94409744909 + 94409744910.

It is an arithmetic number, because the mean of its divisors is an integer number (94409744910).

Almost surely, 2^188819489819 is an apocalyptic number.

188819489819 is a deficient number, since it is larger than the sum of its proper divisors (1).

188819489819 is an equidigital number, since it uses as much as digits as its factorization.

188819489819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95551488, while the sum is 74.

The spelling of 188819489819 in words is "one hundred eighty-eight billion, eight hundred nineteen million, four hundred eighty-nine thousand, eight hundred nineteen".