2165651632 has 20 divisors (see below), whose sum is σ = 4236690640. Its totient is φ = 1072312128.

The previous prime is 2165651627. The next prime is 2165651633. The reversal of 2165651632 is 2361565612.

It is a junction number, because it is equal to n+sod(n) for n = 2165651591 and 2165651600.

It is not an unprimeable number, because it can be changed into a prime (2165651633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655407 + ... + 658702.

It is an arithmetic number, because the mean of its divisors is an integer number (211834532).

Almost surely, 2^2165651632 is an apocalyptic number.

It is an amenable number.

2165651632 is a deficient number, since it is larger than the sum of its proper divisors (2071039008).

2165651632 is a wasteful number, since it uses less digits than its factorization.

2165651632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314220 (or 1314214 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 2165651632 is about 46536.5623139484. The cubic root of 2165651632 is about 1293.7872462318.

The spelling of 2165651632 in words is "two billion, one hundred sixty-five million, six hundred fifty-one thousand, six hundred thirty-two".