45044253440 has 72 divisors (see below), whose sum is σ = 108062298288. Its totient is φ = 17989775360.

The previous prime is 45044253433. The next prime is 45044253481. The reversal of 45044253440 is 4435244054.

It is a self number, because there is not a number n which added to its sum of digits gives 45044253440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808895 + ... + 862785.

It is an arithmetic number, because the mean of its divisors is an integer number (1500865254).

Almost surely, 2^45044253440 is an apocalyptic number.

45044253440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45044253440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54031149144).

45044253440 is an abundant number, since it is smaller than the sum of its proper divisors (63018044848).

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

45044253440 is an equidigital number, since it uses as much as digits as its factorization.

45044253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54565 (or 54551 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 35.

Adding to 45044253440 its reverse (4435244054), we get a palindrome (49479497494).

The spelling of 45044253440 in words is "forty-five billion, forty-four million, two hundred fifty-three thousand, four hundred forty".