51310478920832 has 64 divisors (see below), whose sum is σ = 103399243295040. Its totient is φ = 25360336573440.

The previous prime is 51310478920777. The next prime is 51310478920853. The reversal of 51310478920832 is 23802987401315.

It is a tau number, because it is divible by the number of its divisors (64).

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, 2250533 + ... + 10377179.

It is an arithmetic number, because the mean of its divisors is an integer number (1615613176485).

Almost surely, 2^{51310478920832} 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 51310478920832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51699621647520).

51310478920832 is an abundant number, since it is smaller than the sum of its proper divisors (52088764374208).

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

51310478920832 is a wasteful number, since it uses less digits than its factorization.

51310478920832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8127229 (or 8127217 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 51310478920832 in words is "fifty-one trillion, three hundred ten billion, four hundred seventy-eight million, nine hundred twenty thousand, eight hundred thirty-two".