2019880161 has 24 divisors (see below), whose sum is σ = 3172559936. Its totient is φ = 1230927840.

The previous prime is 2019880157. The next prime is 2019880183. The reversal of 2019880161 is 1610889102.

2019880161 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2019880161 - 2² = 2019880157 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2019880141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71755 + ... + 95856.

Almost surely, 2^2019880161 is an apocalyptic number.

It is an amenable number.

2019880161 is a deficient number, since it is larger than the sum of its proper divisors (1152679775).

2019880161 is a wasteful number, since it uses less digits than its factorization.

2019880161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167733 (or 167730 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 2019880161 is about 44943.0768973376. The cubic root of 2019880161 is about 1264.0818661342.

Subtracting from 2019880161 its product of nonzero digits (6912), we obtain a square (2019873249 = 44943²).

The spelling of 2019880161 in words is "two billion, nineteen million, eight hundred eighty thousand, one hundred sixty-one".