1819850109799 has 4 divisors (see below), whose sum is σ = 1819852808760. Its totient is φ = 1819847410840.

The previous prime is 1819850109773. The next prime is 1819850109853. The reversal of 1819850109799 is 9979010589181.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1819850109799 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 (1819850109299) 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, 621789 + ... + 2006569.

It is an arithmetic number, because the mean of its divisors is an integer number (454963202190).

Almost surely, 2^{1819850109799} is an apocalyptic number.

1819850109799 is a deficient number, since it is larger than the sum of its proper divisors (2698961).

1819850109799 is a wasteful number, since it uses less digits than its factorization.

1819850109799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698960.

The product of its (nonzero) digits is 14696640, while the sum is 67.

The spelling of 1819850109799 in words is "one trillion, eight hundred nineteen billion, eight hundred fifty million, one hundred nine thousand, seven hundred ninety-nine".