2133161865 has 16 divisors (see below), whose sum is σ = 3792288000. Its totient is φ = 1137686256.

The previous prime is 2133161857. The next prime is 2133161893. The reversal of 2133161865 is 5681613312.

2133161865 is a `hidden beast` number, since 2 + 1 + 3 + 31 + 618 + 6 + 5 = 666.

It is not a de Polignac number, because 2133161865 - 2³ = 2133161857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7900465 + ... + 7900734.

It is an arithmetic number, because the mean of its divisors is an integer number (237018000).

Almost surely, 2^2133161865 is an apocalyptic number.

It is an amenable number.

2133161865 is a deficient number, since it is larger than the sum of its proper divisors (1659126135).

2133161865 is a wasteful number, since it uses less digits than its factorization.

2133161865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15801213 (or 15801207 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 2133161865 is about 46186.1652987126. The cubic root of 2133161865 is about 1287.2846887885.

The spelling of 2133161865 in words is "two billion, one hundred thirty-three million, one hundred sixty-one thousand, eight hundred sixty-five".