51777319128 has 16 divisors (see below), whose sum is σ = 129443297880. Its totient is φ = 17259106368.

The previous prime is 51777319123. The next prime is 51777319177. The reversal of 51777319128 is 82191377715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51777319123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078694125 + ... + 1078694172.

Almost surely, 2^51777319128 is an apocalyptic number.

It is an amenable number.

51777319128 is an abundant number, since it is smaller than the sum of its proper divisors (77665978752).

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

51777319128 is a wasteful number, since it uses less digits than its factorization.

51777319128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157388306 (or 2157388302 counting only the distinct ones).

The product of its digits is 740880, while the sum is 51.

The spelling of 51777319128 in words is "fifty-one billion, seven hundred seventy-seven million, three hundred nineteen thousand, one hundred twenty-eight".