50520403889 has 4 divisors (see below), whose sum is σ = 50673033840. Its totient is φ = 50367773940.

The previous prime is 50520403853. The next prime is 50520403909. The reversal of 50520403889 is 98830402505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50520403889 is a prime.

It is a super-4 number, since 4×50520403889⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50520403819) 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 3 ways as a sum of consecutive naturals, for example, 76314479 + ... + 76315140.

It is an arithmetic number, because the mean of its divisors is an integer number (12668258460).

Almost surely, 2^50520403889 is an apocalyptic number.

It is an amenable number.

50520403889 is a deficient number, since it is larger than the sum of its proper divisors (152629951).

50520403889 is a wasteful number, since it uses less digits than its factorization.

50520403889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152629950.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 50520403889 in words is "fifty billion, five hundred twenty million, four hundred three thousand, eight hundred eighty-nine".