5621128069989 has 4 divisors (see below), whose sum is σ = 7494837426656. Its totient is φ = 3747418713324.

The previous prime is 5621128069939. The next prime is 5621128070003. The reversal of 5621128069989 is 9899608211265.

It is a happy number.

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 not a de Polignac number, because 5621128069989 - 2¹¹ = 5621128067941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621128069939) 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, 936854678329 + ... + 936854678334.

It is an arithmetic number, because the mean of its divisors is an integer number (1873709356664).

Almost surely, 2^{5621128069989} is an apocalyptic number.

It is an amenable number.

5621128069989 is a deficient number, since it is larger than the sum of its proper divisors (1873709356667).

5621128069989 is a wasteful number, since it uses less digits than its factorization.

5621128069989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873709356666.

The product of its (nonzero) digits is 33592320, while the sum is 66.

The spelling of 5621128069989 in words is "five trillion, six hundred twenty-one billion, one hundred twenty-eight million, sixty-nine thousand, nine hundred eighty-nine".