50278966189 has 2 divisors, whose sum is σ = 50278966190. Its totient is φ = 50278966188.

The previous prime is 50278966187. The next prime is 50278966193. The reversal of 50278966189 is 98166987205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47160637225 + 3118328964 = 217165^2 + 55842^2 .

It is a cyclic number.

It is not a de Polignac number, because 50278966189 - 2¹ = 50278966187 is a prime.

Together with 50278966187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50278966183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25139483094 + 25139483095.

It is an arithmetic number, because the mean of its divisors is an integer number (25139483095).

Almost surely, 2^50278966189 is an apocalyptic number.

It is an amenable number.

50278966189 is a deficient number, since it is larger than the sum of its proper divisors (1).

50278966189 is an equidigital number, since it uses as much as digits as its factorization.

50278966189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 50278966189 in words is "fifty billion, two hundred seventy-eight million, nine hundred sixty-six thousand, one hundred eighty-nine".