51630131784 has 192 divisors, whose sum is σ = 162837964800. Its totient is φ = 13353056640.

The previous prime is 51630131747. The next prime is 51630131893. The reversal of 51630131784 is 48713103615.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4853079 + ... + 4863705.

It is an arithmetic number, because the mean of its divisors is an integer number (848114400).

Almost surely, 2^51630131784 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 51630131784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81418982400).

51630131784 is an abundant number, since it is smaller than the sum of its proper divisors (111207833016).

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

51630131784 is a wasteful number, since it uses less digits than its factorization.

51630131784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10904 (or 10889 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 51630131784 in words is "fifty-one billion, six hundred thirty million, one hundred thirty-one thousand, seven hundred eighty-four".