243025895640 has 256 divisors, whose sum is σ = 852809472000. Its totient is φ = 54747463680.

The previous prime is 243025895617. The next prime is 243025895641. The reversal of 243025895640 is 46598520342.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 243025895640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243025895641) 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, 1704216 + ... + 1841304.

It is an arithmetic number, because the mean of its divisors is an integer number (3331287000).

Almost surely, 2^243025895640 is an apocalyptic number.

243025895640 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 243025895640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426404736000).

243025895640 is an abundant number, since it is smaller than the sum of its proper divisors (609783576360).

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

243025895640 is a wasteful number, since it uses less digits than its factorization.

243025895640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137210 (or 137206 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 243025895640 in words is "two hundred forty-three billion, twenty-five million, eight hundred ninety-five thousand, six hundred forty".