243661873347 has 12 divisors (see below), whose sum is σ = 352017398304. Its totient is φ = 162412929360.

The previous prime is 243661873309. The next prime is 243661873387. The reversal of 243661873347 is 743378166342.

243661873347 is a `hidden beast` number, since 2 + 436 + 61 + 87 + 33 + 47 = 666.

It is not a de Polignac number, because 243661873347 - 2¹⁶ = 243661807811 is a prime.

It is a super-2 number, since 2×243661873347² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243661873293 and 243661873302.

It is not an unprimeable number, because it can be changed into a prime (243661873387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2305404 + ... + 2408777.

It is an arithmetic number, because the mean of its divisors is an integer number (29334783192).

Almost surely, 2^243661873347 is an apocalyptic number.

243661873347 is a deficient number, since it is larger than the sum of its proper divisors (108355524957).

243661873347 is a wasteful number, since it uses less digits than its factorization.

243661873347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719930 (or 4719927 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 54.

The spelling of 243661873347 in words is "two hundred forty-three billion, six hundred sixty-one million, eight hundred seventy-three thousand, three hundred forty-seven".