243351320004 has 120 divisors (see below), whose sum is σ = 686483336000. Its totient is φ = 74726629056.

The previous prime is 243351319969. The next prime is 243351320033. The reversal of 243351320004 is 400023153342.

243351320004 is a `hidden beast` number, since 2 + 4 + 335 + 1 + 320 + 0 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 243351320004.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2043897 + ... + 2159679.

Almost surely, 2^243351320004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243351320004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343241668000).

243351320004 is an abundant number, since it is smaller than the sum of its proper divisors (443132015996).

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

243351320004 is a wasteful number, since it uses less digits than its factorization.

243351320004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116311 (or 116300 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 243351320004 its reverse (400023153342), we get a palindrome (643374473346).

The spelling of 243351320004 in words is "two hundred forty-three billion, three hundred fifty-one million, three hundred twenty thousand, four".