1816549724227 has 32 divisors (see below), whose sum is σ = 2274658070400. Its totient is φ = 1414495315968.

The previous prime is 1816549724191. The next prime is 1816549724257. The reversal of 1816549724227 is 7224279456181.

It is not a de Polignac number, because 1816549724227 - 2¹¹ = 1816549722179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1816549724257) 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 31 ways as a sum of consecutive naturals, for example, 11701149 + ... + 11855377.

It is an arithmetic number, because the mean of its divisors is an integer number (71083064700).

Almost surely, 2^{1816549724227} is an apocalyptic number.

1816549724227 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1816549724227 is a deficient number, since it is larger than the sum of its proper divisors (458108346173).

1816549724227 is a wasteful number, since it uses less digits than its factorization.

1816549724227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157695.

The product of its digits is 13547520, while the sum is 58.

The spelling of 1816549724227 in words is "one trillion, eight hundred sixteen billion, five hundred forty-nine million, seven hundred twenty-four thousand, two hundred twenty-seven".