2156843264 has 18 divisors (see below), whose sum is σ = 4305261870. Its totient is φ = 1078421504.

The previous prime is 2156843233. The next prime is 2156843267. The reversal of 2156843264 is 4623486512.

It can be written as a sum of positive squares in only one way, i.e., 1584676864 + 572166400 = 39808^2 + 23920^2 .

It is not an unprimeable number, because it can be changed into a prime (2156843267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212329 + ... + 4212840.

It is an arithmetic number, because the mean of its divisors is an integer number (239181215).

Almost surely, 2^2156843264 is an apocalyptic number.

It is an amenable number.

2156843264 is a deficient number, since it is larger than the sum of its proper divisors (2148418606).

2156843264 is an frugal number, since it uses more digits than its factorization.

2156843264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8425185 (or 8425171 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 2156843264 is about 46441.8266651948. The cubic root of 2156843264 is about 1292.0307864876.

The spelling of 2156843264 in words is "two billion, one hundred fifty-six million, eight hundred forty-three thousand, two hundred sixty-four".