51709471360 has 128 divisors (see below), whose sum is σ = 127173110400. Its totient is φ = 20090843136.

The previous prime is 51709471343. The next prime is 51709471369. The reversal of 51709471360 is 6317490715.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (51709471369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17592771 + ... + 17595709.

It is an arithmetic number, because the mean of its divisors is an integer number (993539925).

Almost surely, 2^51709471360 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 51709471360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63586555200).

51709471360 is an abundant number, since it is smaller than the sum of its proper divisors (75463639040).

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

51709471360 is a wasteful number, since it uses less digits than its factorization.

51709471360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738 (or 3726 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 51709471360 in words is "fifty-one billion, seven hundred nine million, four hundred seventy-one thousand, three hundred sixty".