51256944444 has 24 divisors (see below), whose sum is σ = 120459969280. Its totient is φ = 16962729264.

The previous prime is 51256944391. The next prime is 51256944449. The reversal of 51256944444 is 44444965215.

It is a junction number, because it is equal to n+sod(n) for n = 51256944393 and 51256944402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51256944449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15363124 + ... + 15366459.

Almost surely, 2^51256944444 is an apocalyptic number.

It is an amenable number.

51256944444 is an abundant number, since it is smaller than the sum of its proper divisors (69203024836).

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

51256944444 is a wasteful number, since it uses less digits than its factorization.

51256944444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30729729 (or 30729727 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 48.

The spelling of 51256944444 in words is "fifty-one billion, two hundred fifty-six million, nine hundred forty-four thousand, four hundred forty-four".