2165682616 has 32 divisors (see below), whose sum is σ = 4207737600. Its totient is φ = 1044257760.

The previous prime is 2165682601. The next prime is 2165682637. The reversal of 2165682616 is 6162865612.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 12670 + ... + 67021.

It is an arithmetic number, because the mean of its divisors is an integer number (131491800).

Almost surely, 2^2165682616 is an apocalyptic number.

It is an amenable number.

2165682616 is a deficient number, since it is larger than the sum of its proper divisors (2042054984).

2165682616 is a wasteful number, since it uses less digits than its factorization.

2165682616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79819 (or 79815 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 2165682616 is about 46536.8952122937. The cubic root of 2165682616 is about 1293.7934162781.

The spelling of 2165682616 in words is "two billion, one hundred sixty-five million, six hundred eighty-two thousand, six hundred sixteen".