51385466888 has 32 divisors (see below), whose sum is σ = 110123434560. Its totient is φ = 22019999040.

The previous prime is 51385466863. The next prime is 51385467013. The reversal of 51385466888 is 88866458315.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51385466888.

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, 546170 + ... + 633302.

It is an arithmetic number, because the mean of its divisors is an integer number (3441357330).

Almost surely, 2^51385466888 is an apocalyptic number.

It is an amenable number.

51385466888 is an abundant number, since it is smaller than the sum of its proper divisors (58737967672).

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

51385466888 is a wasteful number, since it uses less digits than its factorization.

51385466888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97677 (or 97673 counting only the distinct ones).

The product of its digits is 44236800, while the sum is 62.

It can be divided in two parts, 5138546688 and 8, that multiplied together give a square (41108373504 = 202752²).

The spelling of 51385466888 in words is "fifty-one billion, three hundred eighty-five million, four hundred sixty-six thousand, eight hundred eighty-eight".