243899113822753 has 4 divisors (see below), whose sum is σ = 243972732634948. Its totient is φ = 243825495010560.

The previous prime is 243899113822723. The next prime is 243899113822787. The reversal of 243899113822753 is 357228311998342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138361770001984 + 105537343820769 = 11762728^2 + 10273137^2 .

It is a cyclic number.

It is not a de Polignac number, because 243899113822753 - 2³⁷ = 243761674869281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243899113822723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36809401128 + ... + 36809407753.

It is an arithmetic number, because the mean of its divisors is an integer number (60993183158737).

Almost surely, 2^{243899113822753} is an apocalyptic number.

It is an amenable number.

243899113822753 is a deficient number, since it is larger than the sum of its proper divisors (73618812195).

243899113822753 is an equidigital number, since it uses as much as digits as its factorization.

243899113822753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73618812194.

The product of its digits is 156764160, while the sum is 67.

The spelling of 243899113822753 in words is "two hundred forty-three trillion, eight hundred ninety-nine billion, one hundred thirteen million, eight hundred twenty-two thousand, seven hundred fifty-three".