1816549724213 has 16 divisors (see below), whose sum is σ = 2089606475520. Its totient is φ = 1546883485056.

The previous prime is 1816549724191. The next prime is 1816549724257. The reversal of 1816549724213 is 3124279456181.

It is not a de Polignac number, because 1816549724213 - 2⁶ = 1816549724149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816549724513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7093520 + ... + 7345142.

It is an arithmetic number, because the mean of its divisors is an integer number (130600404720).

Almost surely, 2^{1816549724213} is an apocalyptic number.

It is an amenable number.

1816549724213 is a deficient number, since it is larger than the sum of its proper divisors (273056751307).

1816549724213 is a wasteful number, since it uses less digits than its factorization.

1816549724213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258356.

The product of its digits is 2903040, while the sum is 53.

The spelling of 1816549724213 in words is "one trillion, eight hundred sixteen billion, five hundred forty-nine million, seven hundred twenty-four thousand, two hundred thirteen".