51435040544 has 48 divisors (see below), whose sum is σ = 103964779800. Its totient is φ = 25034096640.

The previous prime is 51435040537. The next prime is 51435040609. The reversal of 51435040544 is 44504053415.

It can be written as a sum of positive squares in 4 ways, for example, as 20181043600 + 31253996944 = 142060^2 + 176788^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545432 + ... + 632744.

Almost surely, 2^51435040544 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 51435040544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51982389900).

51435040544 is an abundant number, since it is smaller than the sum of its proper divisors (52529739256).

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

51435040544 is a wasteful number, since it uses less digits than its factorization.

51435040544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87813 (or 87805 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 51435040544 its reverse (44504053415), we get a palindrome (95939093959).

The spelling of 51435040544 in words is "fifty-one billion, four hundred thirty-five million, forty thousand, five hundred forty-four".