243775535542 has 32 divisors (see below), whose sum is σ = 463618909440. Its totient is φ = 93367690080.

The previous prime is 243775535491. The next prime is 243775535557. The reversal of 243775535542 is 245535577342.

It is a self number, because there is not a number n which added to its sum of digits gives 243775535542.

It is a congruent number.

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, 13405813 + ... + 13423984.

It is an arithmetic number, because the mean of its divisors is an integer number (14488090920).

Almost surely, 2^243775535542 is an apocalyptic number.

243775535542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243775535542 is a deficient number, since it is larger than the sum of its proper divisors (219843373898).

243775535542 is a wasteful number, since it uses less digits than its factorization.

243775535542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26829876.

The product of its digits is 17640000, while the sum is 52.

The spelling of 243775535542 in words is "two hundred forty-three billion, seven hundred seventy-five million, five hundred thirty-five thousand, five hundred forty-two".