243867320956 has 24 divisors (see below), whose sum is σ = 504553079520. Its totient is φ = 100910615232.

The previous prime is 243867320951. The next prime is 243867321001. The reversal of 243867320956 is 659023768342.

It is a junction number, because it is equal to n+sod(n) for n = 243867320897 and 243867320906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243867320951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150163795 + ... + 150165418.

It is an arithmetic number, because the mean of its divisors is an integer number (21023044980).

Almost surely, 2^243867320956 is an apocalyptic number.

It is an amenable number.

243867320956 is an abundant number, since it is smaller than the sum of its proper divisors (260685758564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243867320956 is a wasteful number, since it uses less digits than its factorization.

243867320956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300329253 (or 300329251 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 243867320956 in words is "two hundred forty-three billion, eight hundred sixty-seven million, three hundred twenty thousand, nine hundred fifty-six".