243616556432 has 20 divisors (see below), whose sum is σ = 473618032860. Its totient is φ = 121392547968.

The previous prime is 243616556387. The next prime is 243616556473. The reversal of 243616556432 is 234655616342.

It can be written as a sum of positive squares in 2 ways, for example, as 122189397136 + 121427159296 = 349556^2 + 348464^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25978307 + ... + 25987682.

It is an arithmetic number, because the mean of its divisors is an integer number (23680901643).

Almost surely, 2^243616556432 is an apocalyptic number.

It is an amenable number.

243616556432 is a deficient number, since it is larger than the sum of its proper divisors (230001476428).

243616556432 is a wasteful number, since it uses less digits than its factorization.

243616556432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51966290 (or 51966284 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 47.

The spelling of 243616556432 in words is "two hundred forty-three billion, six hundred sixteen million, five hundred fifty-six thousand, four hundred thirty-two".