243199946515968 has 480 divisors, whose sum is σ = 759179718513216. Its totient is φ = 74504728018944.

The previous prime is 243199946515873. The next prime is 243199946516017. The reversal of 243199946515968 is 869515649991342.

243199946515968 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 9 + 9 + 9 + 4 + 6 + 515 + 96 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40284897846 + ... + 40284903882.

Almost surely, 2^{243199946515968} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243199946515968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379589859256608).

243199946515968 is an abundant number, since it is smaller than the sum of its proper divisors (515979771997248).

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

243199946515968 is a wasteful number, since it uses less digits than its factorization.

243199946515968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8894 (or 8875 counting only the distinct ones).

The product of its digits is 4534963200, while the sum is 81.

The spelling of 243199946515968 in words is "two hundred forty-three trillion, one hundred ninety-nine billion, nine hundred forty-six million, five hundred fifteen thousand, nine hundred sixty-eight".