51859017878960 has 80 divisors (see below), whose sum is σ = 121623791159520. Its totient is φ = 20563345428480.

The previous prime is 51859017878959. The next prime is 51859017878999. The reversal of 51859017878960 is 6987871095815.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39161 + ... + 10184280.

It is an arithmetic number, because the mean of its divisors is an integer number (1520297389494).

Almost surely, 2^{51859017878960} 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 51859017878960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60811895579760).

51859017878960 is an abundant number, since it is smaller than the sum of its proper divisors (69764773280560).

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

51859017878960 is a wasteful number, since it uses less digits than its factorization.

51859017878960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224006 (or 10224000 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 74.

The spelling of 51859017878960 in words is "fifty-one trillion, eight hundred fifty-nine billion, seventeen million, eight hundred seventy-eight thousand, nine hundred sixty".