1816038548353 has 4 divisors (see below), whose sum is σ = 1817506648660. Its totient is φ = 1814570448048.

The previous prime is 1816038548341. The next prime is 1816038548399. The reversal of 1816038548353 is 3538458306181.

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

It can be written as a sum of positive squares in 2 ways, for example, as 902163731329 + 913874817024 = 949823^2 + 955968^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816038548353 - 2⁵ = 1816038548321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1816038548294 and 1816038548303.

It is not an unprimeable number, because it can be changed into a prime (1816033548353) 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, 734048298 + ... + 734050771.

It is an arithmetic number, because the mean of its divisors is an integer number (454376662165).

Almost surely, 2^{1816038548353} is an apocalyptic number.

It is an amenable number.

1816038548353 is a deficient number, since it is larger than the sum of its proper divisors (1468100307).

1816038548353 is a wasteful number, since it uses less digits than its factorization.

1816038548353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468100306.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 1816038548353 in words is "one trillion, eight hundred sixteen billion, thirty-eight million, five hundred forty-eight thousand, three hundred fifty-three".