16398394946819 has 4 divisors (see below), whose sum is σ = 16398491038944. Its totient is φ = 16398298854696.

The previous prime is 16398394946783. The next prime is 16398394946821. The reversal of 16398394946819 is 91864949389361.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16398394946819 is a prime.

It is a super-2 number, since 2×16398394946819² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16398394946849) 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, 47789627 + ... + 48131540.

It is an arithmetic number, because the mean of its divisors is an integer number (4099622759736).

Almost surely, 2^{16398394946819} is an apocalyptic number.

16398394946819 is a deficient number, since it is larger than the sum of its proper divisors (96092125).

16398394946819 is an equidigital number, since it uses as much as digits as its factorization.

16398394946819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96092124.

The product of its digits is 2176782336, while the sum is 80.

The spelling of 16398394946819 in words is "sixteen trillion, three hundred ninety-eight billion, three hundred ninety-four million, nine hundred forty-six thousand, eight hundred nineteen".