43854685121 has 8 divisors (see below), whose sum is σ = 47343600360. Its totient is φ = 40382266752.

The previous prime is 43854685093. The next prime is 43854685123. The reversal of 43854685121 is 12158645834.

43854685121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12229042225 + 31625642896 = 110585^2 + 177836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43854685121 - 2⁶ = 43854685057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43854685123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4118690 + ... + 4129323.

It is an arithmetic number, because the mean of its divisors is an integer number (5917950045).

Almost surely, 2^43854685121 is an apocalyptic number.

It is an amenable number.

43854685121 is a deficient number, since it is larger than the sum of its proper divisors (3488915239).

43854685121 is a wasteful number, since it uses less digits than its factorization.

43854685121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8248435.

The product of its digits is 921600, while the sum is 47.

The spelling of 43854685121 in words is "forty-three billion, eight hundred fifty-four million, six hundred eighty-five thousand, one hundred twenty-one".