2165729516 has 12 divisors (see below), whose sum is σ = 3989501880. Its totient is φ = 1025871840.

The previous prime is 2165729477. The next prime is 2165729521. The reversal of 2165729516 is 6159275612.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14248145 + ... + 14248296.

It is an arithmetic number, because the mean of its divisors is an integer number (332458490).

Almost surely, 2^2165729516 is an apocalyptic number.

It is an amenable number.

2165729516 is a deficient number, since it is larger than the sum of its proper divisors (1823772364).

2165729516 is a wasteful number, since it uses less digits than its factorization.

2165729516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28496464 (or 28496462 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The square root of 2165729516 is about 46537.3991108227. The cubic root of 2165729516 is about 1293.8027556696.

The spelling of 2165729516 in words is "two billion, one hundred sixty-five million, seven hundred twenty-nine thousand, five hundred sixteen".