243655616045 has 16 divisors (see below), whose sum is σ = 296584810752. Its totient is φ = 192129252480.

The previous prime is 243655616041. The next prime is 243655616147. The reversal of 243655616045 is 540616556342.

It is not a de Polignac number, because 243655616045 - 2² = 243655616041 is a prime.

It is a super-2 number, since 2×243655616045² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243655616041) 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, 346880 + ... + 779510.

It is an arithmetic number, because the mean of its divisors is an integer number (18536550672).

Almost surely, 2^243655616045 is an apocalyptic number.

It is an amenable number.

243655616045 is a deficient number, since it is larger than the sum of its proper divisors (52929194707).

243655616045 is a wasteful number, since it uses less digits than its factorization.

243655616045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434252.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 243655616045 in words is "two hundred forty-three billion, six hundred fifty-five million, six hundred sixteen thousand, forty-five".