51263443128 has 64 divisors (see below), whose sum is σ = 133613504640. Its totient is φ = 16375492224.

The previous prime is 51263443123. The next prime is 51263443129. The reversal of 51263443128 is 82134436215.

51263443128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51263443123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413926 + ... + 523317.

It is an arithmetic number, because the mean of its divisors is an integer number (2087711010).

Almost surely, 2^51263443128 is an apocalyptic number.

It is an amenable number.

51263443128 is an abundant number, since it is smaller than the sum of its proper divisors (82350061512).

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

51263443128 is a wasteful number, since it uses less digits than its factorization.

51263443128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937348 (or 937344 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The spelling of 51263443128 in words is "fifty-one billion, two hundred sixty-three million, four hundred forty-three thousand, one hundred twenty-eight".