243345445511 has 64 divisors (see below), whose sum is σ = 302082048000. Its totient is φ = 191561932800.

The previous prime is 243345445487. The next prime is 243345445531. The reversal of 243345445511 is 115544543342.

It is a de Polignac number, because none of the positive numbers 2^k-243345445511 is a prime.

It is a super-2 number, since 2×243345445511² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

Its product of digits (576000) is a multiple of the sum of its prime divisors (1800).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243345445531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 200613941 + ... + 200615153.

It is an arithmetic number, because the mean of its divisors is an integer number (4720032000).

Almost surely, 2^243345445511 is an apocalyptic number.

243345445511 is a deficient number, since it is larger than the sum of its proper divisors (58736602489).

243345445511 is a wasteful number, since it uses less digits than its factorization.

243345445511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800.

The product of its digits is 576000, while the sum is 41.

Adding to 243345445511 its reverse (115544543342), we get a palindrome (358889988853).

The spelling of 243345445511 in words is "two hundred forty-three billion, three hundred forty-five million, four hundred forty-five thousand, five hundred eleven".