50047889921 has 4 divisors (see below), whose sum is σ = 50061963732. Its totient is φ = 50033816112.

The previous prime is 50047889893. The next prime is 50047889999. The reversal of 50047889921 is 12998874005.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8090103025 + 41957786896 = 89945^2 + 204836^2 .

It is a cyclic number.

It is not a de Polignac number, because 50047889921 - 2²⁶ = 49980781057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50047889621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7031570 + ... + 7038683.

It is an arithmetic number, because the mean of its divisors is an integer number (12515490933).

Almost surely, 2^50047889921 is an apocalyptic number.

It is an amenable number.

50047889921 is a deficient number, since it is larger than the sum of its proper divisors (14073811).

50047889921 is a wasteful number, since it uses less digits than its factorization.

50047889921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14073810.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 50047889921 in words is "fifty billion, forty-seven million, eight hundred eighty-nine thousand, nine hundred twenty-one".