51311755752 has 128 divisors (see below), whose sum is σ = 134637465600. Its totient is φ = 16275168000.

The previous prime is 51311755751. The next prime is 51311755763. The reversal of 51311755752 is 25755711315.

It is not an unprimeable number, because it can be changed into a prime (51311755751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13765713 + ... + 13769439.

It is an arithmetic number, because the mean of its divisors is an integer number (1051855200).

Almost surely, 2^51311755752 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 51311755752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67318732800).

51311755752 is an abundant number, since it is smaller than the sum of its proper divisors (83325709848).

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

51311755752 is a wasteful number, since it uses less digits than its factorization.

51311755752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4047 (or 4043 counting only the distinct ones).

The product of its digits is 183750, while the sum is 42.

The spelling of 51311755752 in words is "fifty-one billion, three hundred eleven million, seven hundred fifty-five thousand, seven hundred fifty-two".