243256727123745 has 16 divisors (see below), whose sum is σ = 389370210717312. Its totient is φ = 129683772026240.

The previous prime is 243256727123693. The next prime is 243256727123747. The reversal of 243256727123745 is 547321727652342.

It is not a de Polignac number, because 243256727123745 - 2⁷ = 243256727123617 is a prime.

It is a super-2 number, since 2×243256727123745² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243256727123747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3321781317 + ... + 3321854546.

It is an arithmetic number, because the mean of its divisors is an integer number (24335638169832).

Almost surely, 2^{243256727123745} is an apocalyptic number.

It is an amenable number.

243256727123745 is a deficient number, since it is larger than the sum of its proper divisors (146113483593567).

243256727123745 is a wasteful number, since it uses less digits than its factorization.

243256727123745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6643638312.

The product of its digits is 118540800, while the sum is 60.

The spelling of 243256727123745 in words is "two hundred forty-three trillion, two hundred fifty-six billion, seven hundred twenty-seven million, one hundred twenty-three thousand, seven hundred forty-five".