2143823564 has 6 divisors (see below), whose sum is σ = 3751691244. Its totient is φ = 1071911780.

The previous prime is 2143823551. The next prime is 2143823567. The reversal of 2143823564 is 4653283412.

It is not an unprimeable number, because it can be changed into a prime (2143823567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267977942 + ... + 267977949.

It is an arithmetic number, because the mean of its divisors is an integer number (625281874).

Almost surely, 2^2143823564 is an apocalyptic number.

It is an amenable number.

2143823564 is a deficient number, since it is larger than the sum of its proper divisors (1607867680).

2143823564 is a wasteful number, since it uses less digits than its factorization.

2143823564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535955895 (or 535955893 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 2143823564 is about 46301.4423533436. The cubic root of 2143823564 is about 1289.4257733129.

The spelling of 2143823564 in words is "two billion, one hundred forty-three million, eight hundred twenty-three thousand, five hundred sixty-four".