43044425865 has 48 divisors (see below), whose sum is σ = 88427084928. Its totient is φ = 19677447936.

The previous prime is 43044425821. The next prime is 43044425869. The reversal of 43044425865 is 56852444034.

It is not a de Polignac number, because 43044425865 - 2⁸ = 43044425609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 43044425865.

It is not an unprimeable number, because it can be changed into a prime (43044425869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2522032 + ... + 2539041.

It is an arithmetic number, because the mean of its divisors is an integer number (1842230936).

Almost surely, 2^43044425865 is an apocalyptic number.

43044425865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43044425865 is an abundant number, since it is smaller than the sum of its proper divisors (45382659063).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43044425865 is an equidigital number, since it uses as much as digits as its factorization.

43044425865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061100 (or 5061088 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 45.

Adding to 43044425865 its reverse (56852444034), we get a palindrome (99896869899).

The spelling of 43044425865 in words is "forty-three billion, forty-four million, four hundred twenty-five thousand, eight hundred sixty-five".