1816047516499 has 4 divisors (see below), whose sum is σ = 1816054989336. Its totient is φ = 1816040043664.

The previous prime is 1816047516487. The next prime is 1816047516529. The reversal of 1816047516499 is 9946157406181.

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

It is a cyclic number.

It is not a de Polignac number, because 1816047516499 - 2⁹ = 1816047515987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1816047514499) 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, 3359194 + ... + 3862159.

It is an arithmetic number, because the mean of its divisors is an integer number (454013747334).

Almost surely, 2^{1816047516499} is an apocalyptic number.

1816047516499 is a deficient number, since it is larger than the sum of its proper divisors (7472837).

1816047516499 is an equidigital number, since it uses as much as digits as its factorization.

1816047516499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7472836.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 1816047516499 in words is "one trillion, eight hundred sixteen billion, forty-seven million, five hundred sixteen thousand, four hundred ninety-nine".