50521756488 has 128 divisors (see below), whose sum is σ = 146497977600. Its totient is φ = 14220251136.

The previous prime is 50521756433. The next prime is 50521756541. The reversal of 50521756488 is 88465712505.

It is a self number, because there is not a number n which added to its sum of digits gives 50521756488.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13402668 + ... + 13406436.

It is an arithmetic number, because the mean of its divisors is an integer number (1144515450).

Almost surely, 2^50521756488 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 50521756488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73248988800).

50521756488 is an abundant number, since it is smaller than the sum of its proper divisors (95976221112).

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

50521756488 is a wasteful number, since it uses less digits than its factorization.

50521756488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951 (or 4947 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 51.

The spelling of 50521756488 in words is "fifty billion, five hundred twenty-one million, seven hundred fifty-six thousand, four hundred eighty-eight".