51793444864 has 120 divisors (see below), whose sum is σ = 119829705408. Its totient is φ = 21925724160.

The previous prime is 51793444847. The next prime is 51793444889. The reversal of 51793444864 is 46844439715.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9516384 + ... + 9521824.

Almost surely, 2^51793444864 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 51793444864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59914852704).

51793444864 is an abundant number, since it is smaller than the sum of its proper divisors (68036260544).

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

51793444864 is an frugal number, since it uses more digits than its factorization.

51793444864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559 (or 5533 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 55.

The spelling of 51793444864 in words is "fifty-one billion, seven hundred ninety-three million, four hundred forty-four thousand, eight hundred sixty-four".