1099999999799 has 2 divisors, whose sum is σ = 1099999999800. Its totient is φ = 1099999999798.

The previous prime is 1099999999759. The next prime is 1099999999843. The reversal of 1099999999799 is 9979999999901.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099999999799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099999999759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549999999899 + 549999999900.

It is an arithmetic number, because the mean of its divisors is an integer number (549999999900).

Almost surely, 2^{1099999999799} is an apocalyptic number.

1099999999799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099999999799 is an equidigital number, since it uses as much as digits as its factorization.

1099999999799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24407490807, while the sum is 98.

The spelling of 1099999999799 in words is "one trillion, ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred ninety-nine".