50390545920 has 640 divisors, whose sum is σ = 200462169600. Its totient is φ = 10608967680.

The previous prime is 50390545879. The next prime is 50390545927. The reversal of 50390545920 is 2954509305.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50390545927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18668731 + ... + 18671429.

It is an arithmetic number, because the mean of its divisors is an integer number (313222140).

Almost surely, 2^50390545920 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 50390545920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100231084800).

50390545920 is an abundant number, since it is smaller than the sum of its proper divisors (150071623680).

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

50390545920 is a wasteful number, since it uses less digits than its factorization.

50390545920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766 (or 2750 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 50390545920 in words is "fifty billion, three hundred ninety million, five hundred forty-five thousand, nine hundred twenty".