243174664641 has 16 divisors (see below), whose sum is σ = 326866534400. Its totient is φ = 160801769808.

The previous prime is 243174664639. The next prime is 243174664657. The reversal of 243174664641 is 146466471342.

It is a happy number.

It is not a de Polignac number, because 243174664641 - 2¹ = 243174664639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243174664141) 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, 185040 + ... + 721518.

It is an arithmetic number, because the mean of its divisors is an integer number (20429158400).

Almost surely, 2^243174664641 is an apocalyptic number.

It is an amenable number.

243174664641 is a deficient number, since it is larger than the sum of its proper divisors (83691869759).

243174664641 is a wasteful number, since it uses less digits than its factorization.

243174664641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537708.

The product of its digits is 2322432, while the sum is 48.

The spelling of 243174664641 in words is "two hundred forty-three billion, one hundred seventy-four million, six hundred sixty-four thousand, six hundred forty-one".