243155055545 has 32 divisors (see below), whose sum is σ = 294864396288. Its totient is φ = 192486233088.

The previous prime is 243155055529. The next prime is 243155055553. The reversal of 243155055545 is 545550551342.

It is a cyclic number.

It is not a de Polignac number, because 243155055545 - 2⁴ = 243155055529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243155055496 and 243155055505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187474337 + ... + 187475633.

It is an arithmetic number, because the mean of its divisors is an integer number (9214512384).

Almost surely, 2^243155055545 is an apocalyptic number.

It is an amenable number.

243155055545 is a deficient number, since it is larger than the sum of its proper divisors (51709340743).

243155055545 is a wasteful number, since it uses less digits than its factorization.

243155055545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409.

The product of its (nonzero) digits is 1500000, while the sum is 44.

The spelling of 243155055545 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-five thousand, five hundred forty-five".