51443440504 has 16 divisors (see below), whose sum is σ = 97618578120. Its totient is φ = 25411819680.

The previous prime is 51443440493. The next prime is 51443440507. The reversal of 51443440504 is 40504434415.

It is a self number, because there is not a number n which added to its sum of digits gives 51443440504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51443440507) 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, 38736867 + ... + 38738194.

Almost surely, 2^51443440504 is an apocalyptic number.

It is an amenable number.

51443440504 is a deficient number, since it is larger than the sum of its proper divisors (46175137616).

51443440504 is a wasteful number, since it uses less digits than its factorization.

51443440504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77475150 (or 77475146 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 51443440504 its reverse (40504434415), we get a palindrome (91947874919).

The spelling of 51443440504 in words is "fifty-one billion, four hundred forty-three million, four hundred forty thousand, five hundred four".