243215656260543 has 8 divisors (see below), whose sum is σ = 360319490756400. Its totient is φ = 162143770840344.

The previous prime is 243215656260541. The next prime is 243215656260589. The reversal of 243215656260543 is 345062656512342.

243215656260543 is a `hidden beast` number, since 2 + 4 + 3 + 2 + 1 + 5 + 6 + 5 + 626 + 0 + 5 + 4 + 3 = 666.

It is not a de Polignac number, because 243215656260543 - 2¹ = 243215656260541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243215656260543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243215656260541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4503993634428 + ... + 4503993634481.

It is an arithmetic number, because the mean of its divisors is an integer number (45039936344550).

Almost surely, 2^{243215656260543} is an apocalyptic number.

243215656260543 is a deficient number, since it is larger than the sum of its proper divisors (117103834495857).

243215656260543 is an equidigital number, since it uses as much as digits as its factorization.

243215656260543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9007987268918 (or 9007987268912 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 54.

The spelling of 243215656260543 in words is "two hundred forty-three trillion, two hundred fifteen billion, six hundred fifty-six million, two hundred sixty thousand, five hundred forty-three".