243136319729 has 8 divisors (see below), whose sum is σ = 245882585160. Its totient is φ = 240390374400.

The previous prime is 243136319717. The next prime is 243136319747. The reversal of 243136319729 is 927913631342.

It can be written as a sum of positive squares in 4 ways, for example, as 331786225 + 242804533504 = 18215^2 + 492752^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243136319729 - 2¹² = 243136315633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243136319779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1659989 + ... + 1800509.

It is an arithmetic number, because the mean of its divisors is an integer number (30735323145).

Almost surely, 2^243136319729 is an apocalyptic number.

It is an amenable number.

243136319729 is a deficient number, since it is larger than the sum of its proper divisors (2746265431).

243136319729 is a wasteful number, since it uses less digits than its factorization.

243136319729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160051.

The product of its digits is 1469664, while the sum is 50.

The spelling of 243136319729 in words is "two hundred forty-three billion, one hundred thirty-six million, three hundred nineteen thousand, seven hundred twenty-nine".