51878264080 has 20 divisors (see below), whose sum is σ = 120616964172. Its totient is φ = 20751305600.

The previous prime is 51878264057. The next prime is 51878264099. The reversal of 51878264080 is 8046287815.

It can be written as a sum of positive squares in 2 ways, for example, as 35998231824 + 15880032256 = 189732^2 + 126016^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324239071 + ... + 324239230.

Almost surely, 2^51878264080 is an apocalyptic number.

It is an amenable number.

51878264080 is an abundant number, since it is smaller than the sum of its proper divisors (68738700092).

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

51878264080 is a wasteful number, since it uses less digits than its factorization.

51878264080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648478314 (or 648478308 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 51878264080 in words is "fifty-one billion, eight hundred seventy-eight million, two hundred sixty-four thousand, eighty".