243866421360 has 320 divisors, whose sum is σ = 853126110720. Its totient is φ = 64819180800.

The previous prime is 243866421329. The next prime is 243866421367. The reversal of 243866421360 is 63124668342.

243866421360 is a `hidden beast` number, since 243 + 8 + 6 + 6 + 42 + 1 + 360 = 666.

It is a super-4 number, since 4×243866421360⁴ (a number of 47 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243866421367) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57909655 + ... + 57913865.

It is an arithmetic number, because the mean of its divisors is an integer number (2666019096).

Almost surely, 2^243866421360 is an apocalyptic number.

243866421360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243866421360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426563055360).

243866421360 is an abundant number, since it is smaller than the sum of its proper divisors (609259689360).

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

243866421360 is an equidigital number, since it uses as much as digits as its factorization.

243866421360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576 (or 4552 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 243866421360 in words is "two hundred forty-three billion, eight hundred sixty-six million, four hundred twenty-one thousand, three hundred sixty".