243942624639 has 72 divisors (see below), whose sum is σ = 412517628432. Its totient is φ = 138504038400.

The previous prime is 243942624619. The next prime is 243942624683. The reversal of 243942624639 is 936426249342.

243942624639 is a `hidden beast` number, since 2 + 4 + 3 + 9 + 4 + 2 + 624 + 6 + 3 + 9 = 666.

It is not a de Polignac number, because 243942624639 - 2⁸ = 243942624383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243942624619) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 110730912 + ... + 110733114.

It is an arithmetic number, because the mean of its divisors is an integer number (5729411506).

Almost surely, 2^243942624639 is an apocalyptic number.

243942624639 is a deficient number, since it is larger than the sum of its proper divisors (168575003793).

243942624639 is a wasteful number, since it uses less digits than its factorization.

243942624639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717 (or 3707 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 54.

The spelling of 243942624639 in words is "two hundred forty-three billion, nine hundred forty-two million, six hundred twenty-four thousand, six hundred thirty-nine".