51898384384 has 256 divisors, whose sum is σ = 131766243840. Its totient is φ = 19853475840.

The previous prime is 51898384381. The next prime is 51898384463. The reversal of 51898384384 is 48348389815.

It is a tau number, because it is divible by the number of its divisors (256).

It is not an unprimeable number, because it can be changed into a prime (51898384381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169049959 + ... + 169050265.

It is an arithmetic number, because the mean of its divisors is an integer number (514711890).

Almost surely, 2^51898384384 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 51898384384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65883121920).

51898384384 is an abundant number, since it is smaller than the sum of its proper divisors (79867859456).

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

51898384384 is an equidigital number, since it uses as much as digits as its factorization.

51898384384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 394 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 61.

The spelling of 51898384384 in words is "fifty-one billion, eight hundred ninety-eight million, three hundred eighty-four thousand, three hundred eighty-four".