51317843328 has 128 divisors (see below), whose sum is σ = 152253849600. Its totient is φ = 17016168960.

The previous prime is 51317843303. The next prime is 51317843341. The reversal of 51317843328 is 82334871315.

51317843328 is a `hidden beast` number, since 5 + 1 + 317 + 8 + 4 + 3 + 328 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621225 + ... + 698967.

It is an arithmetic number, because the mean of its divisors is an integer number (1189483200).

Almost surely, 2^51317843328 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 51317843328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76126924800).

51317843328 is an abundant number, since it is smaller than the sum of its proper divisors (100936006272).

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

51317843328 is a wasteful number, since it uses less digits than its factorization.

51317843328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77957 (or 77939 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 51317843328 in words is "fifty-one billion, three hundred seventeen million, eight hundred forty-three thousand, three hundred twenty-eight".