243909801142 has 16 divisors (see below), whose sum is σ = 432549401760. Its totient is φ = 100928193408.

The previous prime is 243909801133. The next prime is 243909801143. The reversal of 243909801142 is 241108909342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243909801143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300381123 + ... + 300381934.

It is an arithmetic number, because the mean of its divisors is an integer number (27034337610).

Almost surely, 2^243909801142 is an apocalyptic number.

243909801142 is a deficient number, since it is larger than the sum of its proper divisors (188639600618).

243909801142 is a wasteful number, since it uses less digits than its factorization.

243909801142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600763095.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 243909801142 in words is "two hundred forty-three billion, nine hundred nine million, eight hundred one thousand, one hundred forty-two".