50808721920 has 320 divisors, whose sum is σ = 181529631360. Its totient is φ = 12016025600.

The previous prime is 50808721919. The next prime is 50808721927. The reversal of 50808721920 is 2912780805.

It is a tau number, because it is divible by the number of its divisors (320).

It is not an unprimeable number, because it can be changed into a prime (50808721927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3456346 + ... + 3471014.

It is an arithmetic number, because the mean of its divisors is an integer number (567280098).

Almost surely, 2^50808721920 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 50808721920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90764815680).

50808721920 is an abundant number, since it is smaller than the sum of its proper divisors (130720909440).

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

50808721920 is a wasteful number, since it uses less digits than its factorization.

50808721920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14747 (or 14731 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 50808721920 in words is "fifty billion, eight hundred eight million, seven hundred twenty-one thousand, nine hundred twenty".