10999999991819 has 2 divisors, whose sum is σ = 10999999991820. Its totient is φ = 10999999991818.

The previous prime is 10999999991777. The next prime is 10999999991839. The reversal of 10999999991819 is 91819999999901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10999999991819 - 2³⁶ = 10931280515083 is a prime.

It is a super-2 number, since 2×10999999991819² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10999999991839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5499999995909 + 5499999995910.

It is an arithmetic number, because the mean of its divisors is an integer number (5499999995910).

Almost surely, 2^{10999999991819} is an apocalyptic number.

10999999991819 is a deficient number, since it is larger than the sum of its proper divisors (1).

10999999991819 is an equidigital number, since it uses as much as digits as its factorization.

10999999991819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3099363912, while the sum is 92.

The spelling of 10999999991819 in words is "ten trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-one thousand, eight hundred nineteen".