51323187168 has 384 divisors, whose sum is σ = 166611271680. Its totient is φ = 15240960000.

The previous prime is 51323187131. The next prime is 51323187169. The reversal of 51323187168 is 86178132315.

It is a happy number.

51323187168 is a `hidden beast` number, since 513 + 2 + 3 + 1 + 8 + 71 + 68 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51323187169) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121907598 + ... + 121908018.

It is an arithmetic number, because the mean of its divisors is an integer number (433883520).

Almost surely, 2^51323187168 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 51323187168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83305635840).

51323187168 is an abundant number, since it is smaller than the sum of its proper divisors (115288084512).

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

51323187168 is a wasteful number, since it uses less digits than its factorization.

51323187168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 665 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The spelling of 51323187168 in words is "fifty-one billion, three hundred twenty-three million, one hundred eighty-seven thousand, one hundred sixty-eight".