243044011555 has 32 divisors (see below), whose sum is σ = 302674268160. Its totient is φ = 187156421760.

The previous prime is 243044011523. The next prime is 243044011583. The reversal of 243044011555 is 555110440342.

It is not a de Polignac number, because 243044011555 - 2⁵ = 243044011523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243044011555.

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, 46406397 + ... + 46411633.

It is an arithmetic number, because the mean of its divisors is an integer number (9458570880).

Almost surely, 2^243044011555 is an apocalyptic number.

243044011555 is a deficient number, since it is larger than the sum of its proper divisors (59630256605).

243044011555 is a wasteful number, since it uses less digits than its factorization.

243044011555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6819.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 243044011555 its reverse (555110440342), we get a palindrome (798154451897).

The spelling of 243044011555 in words is "two hundred forty-three billion, forty-four million, eleven thousand, five hundred fifty-five".