243055453520 has 40 divisors (see below), whose sum is σ = 616477016160. Its totient is φ = 88383800960.

The previous prime is 243055453519. The next prime is 243055453541. The reversal of 243055453520 is 25354550342.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138098810 + ... + 138100569.

It is an arithmetic number, because the mean of its divisors is an integer number (15411925404).

Almost surely, 2^243055453520 is an apocalyptic number.

243055453520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243055453520 is an abundant number, since it is smaller than the sum of its proper divisors (373421562640).

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

243055453520 is a wasteful number, since it uses less digits than its factorization.

243055453520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276199403 (or 276199397 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 38.

The spelling of 243055453520 in words is "two hundred forty-three billion, fifty-five million, four hundred fifty-three thousand, five hundred twenty".