51866141824 has 64 divisors (see below), whose sum is σ = 118771035840. Its totient is φ = 22099792896.

The previous prime is 51866141737. The next prime is 51866141837. The reversal of 51866141824 is 42814166815.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12294 + ... + 322309.

It is an arithmetic number, because the mean of its divisors is an integer number (1855797435).

Almost surely, 2^51866141824 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 51866141824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59385517920).

51866141824 is an abundant number, since it is smaller than the sum of its proper divisors (66904894016).

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

51866141824 is a wasteful number, since it uses less digits than its factorization.

51866141824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334797 (or 334785 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The spelling of 51866141824 in words is "fifty-one billion, eight hundred sixty-six million, one hundred forty-one thousand, eight hundred twenty-four".