50420123440 has 80 divisors (see below), whose sum is σ = 122399237376. Its totient is φ = 19279251200.

The previous prime is 50420123437. The next prime is 50420123491. The reversal of 50420123440 is 4432102405.

It is a happy number.

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

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 15 ways as a sum of consecutive naturals, for example, 3324675 + ... + 3339805.

Almost surely, 2^50420123440 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 50420123440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61199618688).

50420123440 is an abundant number, since it is smaller than the sum of its proper divisors (71979113936).

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

50420123440 is a wasteful number, since it uses less digits than its factorization.

50420123440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16978 (or 16972 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 50420123440 its reverse (4432102405), we get a palindrome (54852225845).

The spelling of 50420123440 in words is "fifty billion, four hundred twenty million, one hundred twenty-three thousand, four hundred forty".