43746618121 has 4 divisors (see below), whose sum is σ = 44362767744. Its totient is φ = 43130468500.

The previous prime is 43746618119. The next prime is 43746618127. The reversal of 43746618121 is 12181664734.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43746618121 - 2¹ = 43746618119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43746618127) 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, 308074705 + ... + 308074846.

It is an arithmetic number, because the mean of its divisors is an integer number (11090691936).

Almost surely, 2^43746618121 is an apocalyptic number.

It is an amenable number.

43746618121 is a deficient number, since it is larger than the sum of its proper divisors (616149623).

43746618121 is an equidigital number, since it uses as much as digits as its factorization.

43746618121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616149622.

The product of its digits is 193536, while the sum is 43.

The spelling of 43746618121 in words is "forty-three billion, seven hundred forty-six million, six hundred eighteen thousand, one hundred twenty-one".