2161602849 has 16 divisors (see below), whose sum is σ = 3467233280. Its totient is φ = 1170190800.

The previous prime is 2161602823. The next prime is 2161602857. The reversal of 2161602849 is 9482061612.

It is not a de Polignac number, because 2161602849 - 2¹⁷ = 2161471777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161602869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2708377 + ... + 2709174.

It is an arithmetic number, because the mean of its divisors is an integer number (216702080).

Almost surely, 2^2161602849 is an apocalyptic number.

It is an amenable number.

2161602849 is a deficient number, since it is larger than the sum of its proper divisors (1305630431).

2161602849 is a wasteful number, since it uses less digits than its factorization.

2161602849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5417580.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 2161602849 is about 46493.0408663490. The cubic root of 2161602849 is about 1292.9804788036.

The spelling of 2161602849 in words is "two billion, one hundred sixty-one million, six hundred two thousand, eight hundred forty-nine".