50005553989 has 2 divisors, whose sum is σ = 50005553990. Its totient is φ = 50005553988.

The previous prime is 50005553981. The next prime is 50005554047. The reversal of 50005553989 is 98935550005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42165336964 + 7840217025 = 205342^2 + 88545^2 .

It is a cyclic number.

It is not a de Polignac number, because 50005553989 - 2³ = 50005553981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50005553981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25002776994 + 25002776995.

It is an arithmetic number, because the mean of its divisors is an integer number (25002776995).

Almost surely, 2^50005553989 is an apocalyptic number.

It is an amenable number.

50005553989 is a deficient number, since it is larger than the sum of its proper divisors (1).

50005553989 is an equidigital number, since it uses as much as digits as its factorization.

50005553989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215000, while the sum is 49.

The spelling of 50005553989 in words is "fifty billion, five million, five hundred fifty-three thousand, nine hundred eighty-nine".