51545515424 has 24 divisors (see below), whose sum is σ = 109286406180. Its totient is φ = 23790237696.

The previous prime is 51545515421. The next prime is 51545515429. The reversal of 51545515424 is 42451554515.

It can be written as a sum of positive squares in 2 ways, for example, as 51483610000 + 61905424 = 226900^2 + 7868^2 .

It is not an unprimeable number, because it can be changed into a prime (51545515421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61953329 + ... + 61954160.

Almost surely, 2^51545515424 is an apocalyptic number.

It is an amenable number.

51545515424 is an abundant number, since it is smaller than the sum of its proper divisors (57740890756).

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

51545515424 is a wasteful number, since it uses less digits than its factorization.

51545515424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123907512 (or 123907504 counting only the distinct ones).

The product of its digits is 400000, while the sum is 41.

The spelling of 51545515424 in words is "fifty-one billion, five hundred forty-five million, five hundred fifteen thousand, four hundred twenty-four".