243120637244253 has 16 divisors (see below), whose sum is σ = 324315703771136. Its totient is φ = 162003011405040.

The previous prime is 243120637244249. The next prime is 243120637244293. The reversal of 243120637244253 is 352442736021342.

It is not a de Polignac number, because 243120637244253 - 2² = 243120637244249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120637244293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69881268 + ... + 73277778.

It is an arithmetic number, because the mean of its divisors is an integer number (20269731485696).

Almost surely, 2^{243120637244253} is an apocalyptic number.

It is an amenable number.

243120637244253 is a deficient number, since it is larger than the sum of its proper divisors (81195066526883).

243120637244253 is a wasteful number, since it uses less digits than its factorization.

243120637244253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407904.

The product of its (nonzero) digits is 5806080, while the sum is 48.

The spelling of 243120637244253 in words is "two hundred forty-three trillion, one hundred twenty billion, six hundred thirty-seven million, two hundred forty-four thousand, two hundred fifty-three".