2099430605865 has 16 divisors (see below), whose sum is σ = 3430558948608. Its totient is φ = 1095872996736.

The previous prime is 2099430605849. The next prime is 2099430605887. The reversal of 2099430605865 is 5685060349902.

It is not a de Polignac number, because 2099430605865 - 2⁴ = 2099430605849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1488957172 + ... + 1488958581.

It is an arithmetic number, because the mean of its divisors is an integer number (214409934288).

Almost surely, 2^{2099430605865} is an apocalyptic number.

It is an amenable number.

2099430605865 is a deficient number, since it is larger than the sum of its proper divisors (1331128342743).

2099430605865 is a wasteful number, since it uses less digits than its factorization.

2099430605865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977915808.

The product of its (nonzero) digits is 13996800, while the sum is 57.

The spelling of 2099430605865 in words is "two trillion, ninety-nine billion, four hundred thirty million, six hundred five thousand, eight hundred sixty-five".