243018434961 has 27 divisors (see below), whose sum is σ = 356059261467. Its totient is φ = 159721956000.

The previous prime is 243018434927. The next prime is 243018434963. The reversal of 243018434961 is 169434810342.

The square root of 243018434961 is 492969.

It is a perfect power (a square), and thus also a powerful number.

243018434961 is a `hidden beast` number, since 2 + 430 + 184 + 34 + 9 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 137949102225 + 105069332736 = 371415^2 + 324144^2 .

It is not a de Polignac number, because 243018434961 - 2³⁷ = 105579481489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243018434963) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 107959086 + ... + 107961336.

Almost surely, 2^243018434961 is an apocalyptic number.

243018434961 is the 492969-th square number.

243018434961 is the 246485-th centered octagonal number.

It is an amenable number.

243018434961 is a deficient number, since it is larger than the sum of its proper divisors (113040826506).

243018434961 is an frugal number, since it uses more digits than its factorization.

243018434961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 243018434961 in words is "two hundred forty-three billion, eighteen million, four hundred thirty-four thousand, nine hundred sixty-one".