51512512144 has 20 divisors (see below), whose sum is σ = 100322625196. Its totient is φ = 25622802432.

The previous prime is 51512512127. The next prime is 51512512151. The reversal of 51512512144 is 44121521515.

It can be written as a sum of positive squares in 2 ways, for example, as 26425753600 + 25086758544 = 162560^2 + 158388^2 .

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 3 ways as a sum of consecutive naturals, for example, 8337669 + ... + 8343844.

Almost surely, 2^51512512144 is an apocalyptic number.

It is an amenable number.

51512512144 is a deficient number, since it is larger than the sum of its proper divisors (48810113052).

51512512144 is a wasteful number, since it uses less digits than its factorization.

51512512144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681714 (or 16681708 counting only the distinct ones).

The product of its digits is 8000, while the sum is 31.

The spelling of 51512512144 in words is "fifty-one billion, five hundred twelve million, five hundred twelve thousand, one hundred forty-four".