243946573140 has 192 divisors, whose sum is σ = 739466993664. Its totient is φ = 59854252032.

The previous prime is 243946573139. The next prime is 243946573159. The reversal of 243946573140 is 41375649342.

It is a happy number.

243946573140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 243946573140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50957827 + ... + 50962613.

It is an arithmetic number, because the mean of its divisors is an integer number (3851390592).

Almost surely, 2^243946573140 is an apocalyptic number.

243946573140 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 243946573140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369733496832).

243946573140 is an abundant number, since it is smaller than the sum of its proper divisors (495520420524).

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

243946573140 is a wasteful number, since it uses less digits than its factorization.

243946573140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5926 (or 5924 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 243946573140 in words is "two hundred forty-three billion, nine hundred forty-six million, five hundred seventy-three thousand, one hundred forty".