51550318080 has 400 divisors, whose sum is σ = 189655361280. Its totient is φ = 13373227008.

The previous prime is 51550318051. The next prime is 51550318087. The reversal of 51550318080 is 8081305515.

51550318080 is a `hidden beast` number, since 515 + 50 + 3 + 18 + 0 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550318087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7668961 + ... + 7675679.

Almost surely, 2^51550318080 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 51550318080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94827680640).

51550318080 is an abundant number, since it is smaller than the sum of its proper divisors (138105043200).

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

51550318080 is an equidigital number, since it uses as much as digits as its factorization.

51550318080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791 (or 6766 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 36.

The spelling of 51550318080 in words is "fifty-one billion, five hundred fifty million, three hundred eighteen thousand, eighty".