243155055505 has 16 divisors (see below), whose sum is σ = 308326510080. Its totient is φ = 183711198528.

The previous prime is 243155055487. The next prime is 243155055529. The reversal of 243155055505 is 505550551342.

It is a cyclic number.

It is not a de Polignac number, because 243155055505 - 2¹¹ = 243155053457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13373142 + ... + 13391311.

It is an arithmetic number, because the mean of its divisors is an integer number (19270406880).

Almost surely, 2^243155055505 is an apocalyptic number.

It is an amenable number.

243155055505 is a deficient number, since it is larger than the sum of its proper divisors (65171454575).

243155055505 is a wasteful number, since it uses less digits than its factorization.

243155055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26764560.

The product of its (nonzero) digits is 375000, while the sum is 40.

The spelling of 243155055505 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-five thousand, five hundred five".