51326728992 has 576 divisors, whose sum is σ = 186403037184. Its totient is φ = 13012254720.

The previous prime is 51326728979. The next prime is 51326729017. The reversal of 51326728992 is 29982762315.

51326728992 is a `hidden beast` number, since 5 + 13 + 267 + 289 + 92 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 230164593 + ... + 230164815.

It is an arithmetic number, because the mean of its divisors is an integer number (323616384).

Almost surely, 2^51326728992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51326728992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93201518592).

51326728992 is an abundant number, since it is smaller than the sum of its proper divisors (135076308192).

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

51326728992 is a wasteful number, since it uses less digits than its factorization.

51326728992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 450 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 51326728992 in words is "fifty-one billion, three hundred twenty-six million, seven hundred twenty-eight thousand, nine hundred ninety-two".