243394863875 has 32 divisors (see below), whose sum is σ = 310507741440. Its totient is φ = 190396060800.

The previous prime is 243394863871. The next prime is 243394863931. The reversal of 243394863875 is 578368493342.

It is not a de Polignac number, because 243394863875 - 2² = 243394863871 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (243394863871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6496697 + ... + 6534053.

It is an arithmetic number, because the mean of its divisors is an integer number (9703366920).

Almost surely, 2^243394863875 is an apocalyptic number.

243394863875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

243394863875 is a deficient number, since it is larger than the sum of its proper divisors (67112877565).

243394863875 is a wasteful number, since it uses less digits than its factorization.

243394863875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38528 (or 38518 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 62.

The spelling of 243394863875 in words is "two hundred forty-three billion, three hundred ninety-four million, eight hundred sixty-three thousand, eight hundred seventy-five".