51873284558508 has 144 divisors (see below), whose sum is σ = 144703836668160. Its totient is φ = 14166815490432.

The previous prime is 51873284558479. The next prime is 51873284558551. The reversal of 51873284558508 is 80585548237815.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64432066 + ... + 65232182.

It is an arithmetic number, because the mean of its divisors is an integer number (1004887754640).

Almost surely, 2^{51873284558508} 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 51873284558508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72351918334080).

51873284558508 is an abundant number, since it is smaller than the sum of its proper divisors (92830552109652).

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

51873284558508 is a wasteful number, since it uses less digits than its factorization.

51873284558508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801636 (or 801611 counting only the distinct ones).

The product of its (nonzero) digits is 430080000, while the sum is 69.

The spelling of 51873284558508 in words is "fifty-one trillion, eight hundred seventy-three billion, two hundred eighty-four million, five hundred fifty-eight thousand, five hundred eight".