1816445964415 has 16 divisors (see below), whose sum is σ = 2237598544896. Its totient is φ = 1414798509600.

The previous prime is 1816445964343. The next prime is 1816445964449. The reversal of 1816445964415 is 5144695446181.

It is not a de Polignac number, because 1816445964415 - 2³¹ = 1814298480767 is a prime.

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 1816445964415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13516071 + ... + 13649800.

It is an arithmetic number, because the mean of its divisors is an integer number (139849909056).

Almost surely, 2^{1816445964415} is an apocalyptic number.

1816445964415 is a deficient number, since it is larger than the sum of its proper divisors (421152580481).

1816445964415 is a wasteful number, since it uses less digits than its factorization.

1816445964415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27166230.

The product of its digits is 16588800, while the sum is 58.

The spelling of 1816445964415 in words is "one trillion, eight hundred sixteen billion, four hundred forty-five million, nine hundred sixty-four thousand, four hundred fifteen".