51800173620 has 96 divisors (see below), whose sum is σ = 156982828800. Its totient is φ = 12686699520.

The previous prime is 51800173619. The next prime is 51800173631. The reversal of 51800173620 is 2637100815.

51800173620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11641 + ... + 322080.

It is an arithmetic number, because the mean of its divisors is an integer number (1635237800).

Almost surely, 2^51800173620 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 51800173620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78491414400).

51800173620 is an abundant number, since it is smaller than the sum of its proper divisors (105182655180).

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

51800173620 is a wasteful number, since it uses less digits than its factorization.

51800173620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333945 (or 333943 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 51800173620 in words is "fifty-one billion, eight hundred million, one hundred seventy-three thousand, six hundred twenty".