243724137504 has 48 divisors (see below), whose sum is σ = 650264005440. Its totient is φ = 79909551360.

The previous prime is 243724137497. The next prime is 243724137523. The reversal of 243724137504 is 405731427342.

It is a tau number, because it is divible by the number of its divisors (48).

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, 20803924 + ... + 20815635.

It is an arithmetic number, because the mean of its divisors is an integer number (13547166780).

Almost surely, 2^243724137504 is an apocalyptic number.

243724137504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

243724137504 is an abundant number, since it is smaller than the sum of its proper divisors (406539867936).

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

243724137504 is a wasteful number, since it uses less digits than its factorization.

243724137504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41619633 (or 41619625 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 42.

The spelling of 243724137504 in words is "two hundred forty-three billion, seven hundred twenty-four million, one hundred thirty-seven thousand, five hundred four".