243245064641 has 4 divisors (see below), whose sum is σ = 243447601284. Its totient is φ = 243042528000.

The previous prime is 243245064619. The next prime is 243245064653. The reversal of 243245064641 is 146460542342.

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 91382871616 + 151862193025 = 302296^2 + 389695^2 .

It is a cyclic number.

It is not a de Polignac number, because 243245064641 - 2⁶ = 243245064577 is a prime.

It is a super-2 number, since 2×243245064641² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243245064611) 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, 101266520 + ... + 101268921.

It is an arithmetic number, because the mean of its divisors is an integer number (60861900321).

Almost surely, 2^243245064641 is an apocalyptic number.

It is an amenable number.

243245064641 is a deficient number, since it is larger than the sum of its proper divisors (202536643).

243245064641 is a wasteful number, since it uses less digits than its factorization.

243245064641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202536642.

The product of its (nonzero) digits is 552960, while the sum is 41.

The spelling of 243245064641 in words is "two hundred forty-three billion, two hundred forty-five million, sixty-four thousand, six hundred forty-one".