3819856459818 has 24 divisors (see below), whose sum is σ = 8887012988832. Its totient is φ = 1091387559864.

The previous prime is 3819856459781. The next prime is 3819856459831. The reversal of 3819856459818 is 8189546589183.

It is a super-2 number, since 2×3819856459818² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3819856459818.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6496354230 + ... + 6496354817.

It is an arithmetic number, because the mean of its divisors is an integer number (370292207868).

Almost surely, 2^{3819856459818} is an apocalyptic number.

3819856459818 is an abundant number, since it is smaller than the sum of its proper divisors (5067156529014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3819856459818 is a wasteful number, since it uses less digits than its factorization.

3819856459818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12992709066 (or 12992709059 counting only the distinct ones).

The product of its digits is 597196800, while the sum is 75.

The spelling of 3819856459818 in words is "three trillion, eight hundred nineteen billion, eight hundred fifty-six million, four hundred fifty-nine thousand, eight hundred eighteen".