2165936673 has 32 divisors (see below), whose sum is σ = 3188643840. Its totient is φ = 1302609600.

The previous prime is 2165936639. The next prime is 2165936677. The reversal of 2165936673 is 3766395612.

It is not a de Polignac number, because 2165936673 - 2⁶ = 2165936609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2165936677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88198 + ... + 110048.

It is an arithmetic number, because the mean of its divisors is an integer number (99645120).

Almost surely, 2^2165936673 is an apocalyptic number.

It is an amenable number.

2165936673 is a deficient number, since it is larger than the sum of its proper divisors (1022707167).

2165936673 is a wasteful number, since it uses less digits than its factorization.

2165936673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21957.

The product of its digits is 1224720, while the sum is 48.

The square root of 2165936673 is about 46539.6247621315. The cubic root of 2165936673 is about 1293.8440060890.

The spelling of 2165936673 in words is "two billion, one hundred sixty-five million, nine hundred thirty-six thousand, six hundred seventy-three".