51556005136 has 10 divisors (see below), whose sum is σ = 99889759982. Its totient is φ = 25778002560.

The previous prime is 51556005133. The next prime is 51556005167. The reversal of 51556005136 is 63150065515.

It can be written as a sum of positive squares in only one way, i.e., 48655536400 + 2900468736 = 220580^2 + 53856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51556005095 and 51556005104.

It is not an unprimeable number, because it can be changed into a prime (51556005131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611125145 + ... + 1611125176.

Almost surely, 2^51556005136 is an apocalyptic number.

It is an amenable number.

51556005136 is a deficient number, since it is larger than the sum of its proper divisors (48333754846).

51556005136 is a wasteful number, since it uses less digits than its factorization.

51556005136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222250329 (or 3222250323 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 37.

The spelling of 51556005136 in words is "fifty-one billion, five hundred fifty-six million, five thousand, one hundred thirty-six".