51993794160 has 1920 divisors, whose sum is σ = 250621102080. Its totient is φ = 9754214400.

The previous prime is 51993794117. The next prime is 51993794173. The reversal of 51993794160 is 6149739915.

51993794160 is a `hidden beast` number, since 5 + 199 + 37 + 9 + 416 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 51993794097 and 51993794106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 732306925 + ... + 732306995.

It is an arithmetic number, because the mean of its divisors is an integer number (130531824).

Almost surely, 2^51993794160 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 51993794160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125310551040).

51993794160 is an abundant number, since it is smaller than the sum of its proper divisors (198627307920).

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

51993794160 is a wasteful number, since it uses less digits than its factorization.

51993794160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The spelling of 51993794160 in words is "fifty-one billion, nine hundred ninety-three million, seven hundred ninety-four thousand, one hundred sixty".