75043053440 has 128 divisors (see below), whose sum is σ = 182773432800. Its totient is φ = 29454630912.

The previous prime is 75043053433. The next prime is 75043053443. The reversal of 75043053440 is 4435034057.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 75043053440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75043053443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25411004 + ... + 25413956.

Almost surely, 2^75043053440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75043053440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91386716400).

75043053440 is an abundant number, since it is smaller than the sum of its proper divisors (107730379360).

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

75043053440 is a wasteful number, since it uses less digits than its factorization.

75043053440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704 (or 3692 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 35.

Adding to 75043053440 its reverse (4435034057), we get a palindrome (79478087497).

The spelling of 75043053440 in words is "seventy-five billion, forty-three million, fifty-three thousand, four hundred forty".