243602705427545 has 32 divisors (see below), whose sum is σ = 304224902831520. Its totient is φ = 187030485053440.

The previous prime is 243602705427493. The next prime is 243602705427581. The reversal of 243602705427545 is 545724507206342.

It can be written as a sum of positive squares in 16 ways, for example, as 9866063178841 + 233736642248704 = 3141029^2 + 15288448^2 .

It is a de Polignac number, because none of the positive numbers 2^k-243602705427545 is a prime.

It is a super-3 number, since 3×243602705427545³ (a number of 44 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26288609 + ... + 34326321.

It is an arithmetic number, because the mean of its divisors is an integer number (9507028213485).

Almost surely, 2^{243602705427545} is an apocalyptic number.

It is an amenable number.

243602705427545 is a deficient number, since it is larger than the sum of its proper divisors (60622197403975).

243602705427545 is a wasteful number, since it uses less digits than its factorization.

243602705427545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8039005.

The product of its (nonzero) digits is 56448000, while the sum is 56.

The spelling of 243602705427545 in words is "two hundred forty-three trillion, six hundred two billion, seven hundred five million, four hundred twenty-seven thousand, five hundred forty-five".