2165945982 has 8 divisors (see below), whose sum is σ = 4331891976. Its totient is φ = 721981992.

The previous prime is 2165945981. The next prime is 2165946007. The reversal of 2165945982 is 2895495612.

2165945982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

2165945982 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165945981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180495493 + ... + 180495504.

It is an arithmetic number, because the mean of its divisors is an integer number (541486497).

Almost surely, 2^2165945982 is an apocalyptic number.

2165945982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165945982 is a wasteful number, since it uses less digits than its factorization.

2165945982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360991002.

The product of its digits is 1555200, while the sum is 51.

The square root of 2165945982 is about 46539.7247735738. The cubic root of 2165945982 is about 1293.8458596945.

The spelling of 2165945982 in words is "two billion, one hundred sixty-five million, nine hundred forty-five thousand, nine hundred eighty-two".