243264442138 has 8 divisors (see below), whose sum is σ = 365078844288. Its totient is φ = 121571494044.

The previous prime is 243264442117. The next prime is 243264442147. The reversal of 243264442138 is 831244462342.

243264442138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×243264442138² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243264442094 and 243264442103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30358506 + ... + 30366517.

It is an arithmetic number, because the mean of its divisors is an integer number (45634855536).

Almost surely, 2^243264442138 is an apocalyptic number.

243264442138 is a deficient number, since it is larger than the sum of its proper divisors (121814402150).

243264442138 is a wasteful number, since it uses less digits than its factorization.

243264442138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60727028.

The product of its digits is 884736, while the sum is 43.

The spelling of 243264442138 in words is "two hundred forty-three billion, two hundred sixty-four million, four hundred forty-two thousand, one hundred thirty-eight".