51303321616 has 120 divisors (see below), whose sum is σ = 108100938240. Its totient is φ = 23574644736.

The previous prime is 51303321613. The next prime is 51303321617. The reversal of 51303321616 is 61612330315.

It is not an unprimeable number, because it can be changed into a prime (51303321613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47196625 + ... + 47197711.

It is an arithmetic number, because the mean of its divisors is an integer number (900841152).

Almost surely, 2^51303321616 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 51303321616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54050469120).

51303321616 is an abundant number, since it is smaller than the sum of its proper divisors (56797616624).

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

51303321616 is a wasteful number, since it uses less digits than its factorization.

51303321616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1338 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The spelling of 51303321616 in words is "fifty-one billion, three hundred three million, three hundred twenty-one thousand, six hundred sixteen".