185479043189819 has 4 divisors (see below), whose sum is σ = 191874872265360. Its totient is φ = 179083214114280.

The previous prime is 185479043189777. The next prime is 185479043189837. The reversal of 185479043189819 is 918981340974581.

185479043189819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-185479043189819 is a prime.

It is a super-2 number, since 2×185479043189819² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 185479043189819.

It is not an unprimeable number, because it can be changed into a prime (185479043189849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197914537727 + ... + 3197914537784.

It is an arithmetic number, because the mean of its divisors is an integer number (47968718066340).

Almost surely, 2^{185479043189819} is an apocalyptic number.

185479043189819 is a deficient number, since it is larger than the sum of its proper divisors (6395829075541).

185479043189819 is an equidigital number, since it uses as much as digits as its factorization.

185479043189819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395829075540.

The product of its (nonzero) digits is 627056640, while the sum is 77.

The spelling of 185479043189819 in words is "one hundred eighty-five trillion, four hundred seventy-nine billion, forty-three million, one hundred eighty-nine thousand, eight hundred nineteen".