1815013404199 has 2 divisors, whose sum is σ = 1815013404200. Its totient is φ = 1815013404198.

The previous prime is 1815013404119. The next prime is 1815013404209. The reversal of 1815013404199 is 9914043105181.

It is a strong prime.

It is an emirp because it is prime and its reverse (9914043105181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1815013404199 - 2¹¹ = 1815013402151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1815013404119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907506702099 + 907506702100.

It is an arithmetic number, because the mean of its divisors is an integer number (907506702100).

Almost surely, 2^{1815013404199} is an apocalyptic number.

1815013404199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1815013404199 is an equidigital number, since it uses as much as digits as its factorization.

1815013404199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 1815013404199 in words is "one trillion, eight hundred fifteen billion, thirteen million, four hundred four thousand, one hundred ninety-nine".