51317110720 has 112 divisors (see below), whose sum is σ = 123919488000. Its totient is φ = 20238566400.

The previous prime is 51317110681. The next prime is 51317110807. The reversal of 51317110720 is 2701171315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35365995 + ... + 35367445.

It is an arithmetic number, because the mean of its divisors is an integer number (1106424000).

Almost surely, 2^51317110720 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 51317110720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61959744000).

51317110720 is an abundant number, since it is smaller than the sum of its proper divisors (72602377280).

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

51317110720 is a wasteful number, since it uses less digits than its factorization.

51317110720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946 (or 2936 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 28.

The spelling of 51317110720 in words is "fifty-one billion, three hundred seventeen million, one hundred ten thousand, seven hundred twenty".