799999990111111 has 2 divisors, whose sum is σ = 799999990111112. Its totient is φ = 799999990111110.

The previous prime is 799999990111073. The next prime is 799999990111139. The reversal of 799999990111111 is 111111099999997.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (111111099999997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 799999990111111 - 2³¹ = 799997842627463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (799999990111171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399999995055555 + 399999995055556.

It is an arithmetic number, because the mean of its divisors is an integer number (399999995055556).

Almost surely, 2^{799999990111111} is an apocalyptic number.

799999990111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

799999990111111 is an equidigital number, since it uses as much as digits as its factorization.

799999990111111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33480783, while the sum is 76.

The spelling of 799999990111111 in words is "seven hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety million, one hundred eleven thousand, one hundred eleven".