243444420144 has 60 divisors (see below), whose sum is σ = 697923501912. Its totient is φ = 79168915200.

The previous prime is 243444420143. The next prime is 243444420169. The reversal of 243444420144 is 441024444342.

It is a happy number.

243444420144 is a `hidden beast` number, since 2 + 4 + 3 + 4 + 444 + 201 + 4 + 4 = 666.

It is a super-3 number, since 3×243444420144³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 243444420099 and 243444420108.

It is not an unprimeable number, because it can be changed into a prime (243444420143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20611002 + ... + 20622809.

Almost surely, 2^243444420144 is an apocalyptic number.

243444420144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

243444420144 is an abundant number, since it is smaller than the sum of its proper divisors (454479081768).

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

243444420144 is a wasteful number, since it uses less digits than its factorization.

243444420144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41233866 (or 41233857 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 36.

Adding to 243444420144 its reverse (441024444342), we get a palindrome (684468864486).

The spelling of 243444420144 in words is "two hundred forty-three billion, four hundred forty-four million, four hundred twenty thousand, one hundred forty-four".