51010420189 has 2 divisors, whose sum is σ = 51010420190. Its totient is φ = 51010420188.

The previous prime is 51010420177. The next prime is 51010420229. The reversal of 51010420189 is 98102401015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48927228025 + 2083192164 = 221195^2 + 45642^2 .

It is a cyclic number.

It is not a de Polignac number, because 51010420189 - 2⁵ = 51010420157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51010420189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51010420129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505210094 + 25505210095.

It is an arithmetic number, because the mean of its divisors is an integer number (25505210095).

Almost surely, 2^51010420189 is an apocalyptic number.

It is an amenable number.

51010420189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51010420189 is an equidigital number, since it uses as much as digits as its factorization.

51010420189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The spelling of 51010420189 in words is "fifty-one billion, ten million, four hundred twenty thousand, one hundred eighty-nine".