2091611899 has 8 divisors (see below), whose sum is σ = 2254642992. Its totient is φ = 1928886240.

The previous prime is 2091611897. The next prime is 2091611909. The reversal of 2091611899 is 9981161902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091611899 - 2¹ = 2091611897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091611897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62029 + ... + 89614.

It is an arithmetic number, because the mean of its divisors is an integer number (281830374).

Almost surely, 2^2091611899 is an apocalyptic number.

2091611899 is a deficient number, since it is larger than the sum of its proper divisors (163031093).

2091611899 is a wasteful number, since it uses less digits than its factorization.

2091611899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152717.

The product of its (nonzero) digits is 69984, while the sum is 46.

The square root of 2091611899 is about 45734.1436893706. The cubic root of 2091611899 is about 1278.8718695783.

The spelling of 2091611899 in words is "two billion, ninety-one million, six hundred eleven thousand, eight hundred ninety-nine".