51895468812 has 144 divisors (see below), whose sum is σ = 143035562880. Its totient is φ = 14579473920.

The previous prime is 51895468799. The next prime is 51895468819. The reversal of 51895468812 is 21886459815.

It is not an unprimeable number, because it can be changed into a prime (51895468819) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1638139 + ... + 1669517.

It is an arithmetic number, because the mean of its divisors is an integer number (993302520).

Almost surely, 2^51895468812 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 51895468812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71517781440).

51895468812 is an abundant number, since it is smaller than the sum of its proper divisors (91140094068).

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

51895468812 is a wasteful number, since it uses less digits than its factorization.

51895468812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31492 (or 31479 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 57.

The spelling of 51895468812 in words is "fifty-one billion, eight hundred ninety-five million, four hundred sixty-eight thousand, eight hundred twelve".