43409318618 has 4 divisors (see below), whose sum is σ = 65113977930. Its totient is φ = 21704659308.

The previous prime is 43409318611. The next prime is 43409318657. The reversal of 43409318618 is 81681390434.

43409318618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38191712329 + 5217606289 = 195427^2 + 72233^2 .

It is not an unprimeable number, because it can be changed into a prime (43409318611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10852329653 + ... + 10852329656.

Almost surely, 2^43409318618 is an apocalyptic number.

43409318618 is a deficient number, since it is larger than the sum of its proper divisors (21704659312).

43409318618 is a wasteful number, since it uses less digits than its factorization.

43409318618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21704659311.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 43409318618 in words is "forty-three billion, four hundred nine million, three hundred eighteen thousand, six hundred eighteen".