243005371776643 has 16 divisors (see below), whose sum is σ = 293591955870720. Its totient is φ = 196480770417216.

The previous prime is 243005371776613. The next prime is 243005371776649. The reversal of 243005371776643 is 346677173500342.

It is a cyclic number.

It is not a de Polignac number, because 243005371776643 - 2³³ = 242996781842051 is a prime.

It is a super-2 number, since 2×243005371776643² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243005371776649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3920801755 + ... + 3920863732.

It is an arithmetic number, because the mean of its divisors is an integer number (18349497241920).

Almost surely, 2^{243005371776643} is an apocalyptic number.

243005371776643 is a deficient number, since it is larger than the sum of its proper divisors (50586584094077).

243005371776643 is a wasteful number, since it uses less digits than its factorization.

243005371776643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7841665746.

The product of its (nonzero) digits is 53343360, while the sum is 58.

The spelling of 243005371776643 in words is "two hundred forty-three trillion, five billion, three hundred seventy-one million, seven hundred seventy-six thousand, six hundred forty-three".