243581680429952 has 64 divisors (see below), whose sum is σ = 503993471511600. Its totient is φ = 117122664960000.

The previous prime is 243581680429949. The next prime is 243581680429961. The reversal of 243581680429952 is 259924086185342.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×243581680429952² (a number of 30 digits) contains 22 as substring.

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, 129785549 + ... + 131648972.

Almost surely, 2^{243581680429952} is an apocalyptic number.

It is an amenable number.

243581680429952 is an abundant number, since it is smaller than the sum of its proper divisors (260411791081648).

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

243581680429952 is a wasteful number, since it uses less digits than its factorization.

243581680429952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261434815 (or 261434803 counting only the distinct ones).

The product of its (nonzero) digits is 298598400, while the sum is 68.

The spelling of 243581680429952 in words is "two hundred forty-three trillion, five hundred eighty-one billion, six hundred eighty million, four hundred twenty-nine thousand, nine hundred fifty-two".