2156553324243 has 6 divisors (see below), whose sum is σ = 3115021468364. Its totient is φ = 1437702216156.

The previous prime is 2156553324221. The next prime is 2156553324271. The reversal of 2156553324243 is 3424233556512.

2156553324243 is a `hidden beast` number, since 2 + 1 + 56 + 5 + 533 + 24 + 2 + 43 = 666.

It is not a de Polignac number, because 2156553324243 - 2⁶ = 2156553324179 is a prime.

It is a super-3 number, since 3×2156553324243³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156553326243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119808518005 + ... + 119808518022.

Almost surely, 2^{2156553324243} is an apocalyptic number.

2156553324243 is a deficient number, since it is larger than the sum of its proper divisors (958468144121).

2156553324243 is a wasteful number, since it uses less digits than its factorization.

2156553324243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239617036033 (or 239617036030 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 45.

The spelling of 2156553324243 in words is "two trillion, one hundred fifty-six billion, five hundred fifty-three million, three hundred twenty-four thousand, two hundred forty-three".