51993335912 has 48 divisors (see below), whose sum is σ = 113560443360. Its totient is φ = 22252085856.

The previous prime is 51993335899. The next prime is 51993335971. The reversal of 51993335912 is 21953339915.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193763 + ... + 376205.

It is an arithmetic number, because the mean of its divisors is an integer number (2365842570).

Almost surely, 2^51993335912 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 51993335912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56780221680).

51993335912 is an abundant number, since it is smaller than the sum of its proper divisors (61567107448).

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

51993335912 is a wasteful number, since it uses less digits than its factorization.

51993335912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183190 (or 183179 counting only the distinct ones).

The product of its digits is 984150, while the sum is 50.

The spelling of 51993335912 in words is "fifty-one billion, nine hundred ninety-three million, three hundred thirty-five thousand, nine hundred twelve".