51390070189 has 2 divisors, whose sum is σ = 51390070190. Its totient is φ = 51390070188.

The previous prime is 51390070177. The next prime is 51390070213. The reversal of 51390070189 is 98107009315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51366596164 + 23474025 = 226642^2 + 4845^2 .

It is a cyclic number.

It is not a de Polignac number, because 51390070189 - 2⁹ = 51390069677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51390070289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25695035094 + 25695035095.

It is an arithmetic number, because the mean of its divisors is an integer number (25695035095).

Almost surely, 2^51390070189 is an apocalyptic number.

It is an amenable number.

51390070189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51390070189 is an equidigital number, since it uses as much as digits as its factorization.

51390070189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 43.

The spelling of 51390070189 in words is "fifty-one billion, three hundred ninety million, seventy thousand, one hundred eighty-nine".