243721369073 has 64 divisors (see below), whose sum is σ = 310532877312. Its totient is φ = 186131312640.

The previous prime is 243721369051. The next prime is 243721369079. The reversal of 243721369073 is 370963127342.

It is a de Polignac number, because none of the positive numbers 2^k-243721369073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243721369079) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 296137340 + ... + 296138162.

It is an arithmetic number, because the mean of its divisors is an integer number (4852076208).

Almost surely, 2^243721369073 is an apocalyptic number.

It is an amenable number.

243721369073 is a deficient number, since it is larger than the sum of its proper divisors (66811508239).

243721369073 is a wasteful number, since it uses less digits than its factorization.

243721369073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474.

The product of its (nonzero) digits is 1143072, while the sum is 47.

The spelling of 243721369073 in words is "two hundred forty-three billion, seven hundred twenty-one million, three hundred sixty-nine thousand, seventy-three".