243113613666 has 128 divisors (see below), whose sum is σ = 628347469824. Its totient is φ = 60880057920.

The previous prime is 243113613607. The next prime is 243113613679. The reversal of 243113613666 is 666316311342.

243113613666 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243113613666² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 63 ways as a sum of consecutive naturals, for example, 1371285 + ... + 1538391.

It is an arithmetic number, because the mean of its divisors is an integer number (4908964608).

Almost surely, 2^243113613666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243113613666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314173734912).

243113613666 is an abundant number, since it is smaller than the sum of its proper divisors (385233856158).

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

243113613666 is a wasteful number, since it uses less digits than its factorization.

243113613666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167244.

The product of its digits is 279936, while the sum is 42.

The spelling of 243113613666 in words is "two hundred forty-three billion, one hundred thirteen million, six hundred thirteen thousand, six hundred sixty-six".