243949898544 has 720 divisors, whose sum is σ = 787404602880. Its totient is φ = 64876134400.

The previous prime is 243949898519. The next prime is 243949898573. The reversal of 243949898544 is 445898949342.

It is a Harshad number since it is a multiple of its sum of digits (69).

Its product of digits (358318080) is a multiple of the sum of its prime divisors (216).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2741010052 + ... + 2741010140.

It is an arithmetic number, because the mean of its divisors is an integer number (1093617504).

Almost surely, 2^243949898544 is an apocalyptic number.

243949898544 is a gapful number since it is divisible by the number (24) 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 243949898544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393702301440).

243949898544 is an abundant number, since it is smaller than the sum of its proper divisors (543454704336).

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

243949898544 is a wasteful number, since it uses less digits than its factorization.

243949898544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 216 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 69.

The spelling of 243949898544 in words is "two hundred forty-three billion, nine hundred forty-nine million, eight hundred ninety-eight thousand, five hundred forty-four".