1999550268011 has 4 divisors (see below), whose sum is σ = 2008281928800. Its totient is φ = 1990818607224.

The previous prime is 1999550267977. The next prime is 1999550268013. The reversal of 1999550268011 is 1108620559991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1999550268011 - 2¹⁴ = 1999550251627 is a prime.

It is a super-2 number, since 2×1999550268011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999550268013) 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 in 3 ways as a sum of consecutive naturals, for example, 4365830051 + ... + 4365830508.

It is an arithmetic number, because the mean of its divisors is an integer number (502070482200).

Almost surely, 2^{1999550268011} is an apocalyptic number.

1999550268011 is a deficient number, since it is larger than the sum of its proper divisors (8731660789).

1999550268011 is an equidigital number, since it uses as much as digits as its factorization.

1999550268011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731660788.

The product of its (nonzero) digits is 1749600, while the sum is 56.

The spelling of 1999550268011 in words is "one trillion, nine hundred ninety-nine billion, five hundred fifty million, two hundred sixty-eight thousand, eleven".