50565099920 has 80 divisors (see below), whose sum is σ = 120818485872. Its totient is φ = 19669278720.

The previous prime is 50565099773. The next prime is 50565099929. The reversal of 50565099920 is 2999056505.

It can be written as a sum of positive squares in 8 ways, for example, as 32116940944 + 18448158976 = 179212^2 + 135824^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (50565099929) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1002014 + ... + 1051266.

Almost surely, 2^50565099920 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 50565099920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60409242936).

50565099920 is an abundant number, since it is smaller than the sum of its proper divisors (70253385952).

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

50565099920 is a wasteful number, since it uses less digits than its factorization.

50565099920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49620 (or 49614 counting only the distinct ones).

The product of its (nonzero) digits is 1093500, while the sum is 50.

The spelling of 50565099920 in words is "fifty billion, five hundred sixty-five million, ninety-nine thousand, nine hundred twenty".