51961471129 has 2 divisors, whose sum is σ = 51961471130. Its totient is φ = 51961471128.

The previous prime is 51961471123. The next prime is 51961471141. The reversal of 51961471129 is 92117416915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34970870025 + 16990601104 = 187005^2 + 130348^2 .

It is a cyclic number.

It is not a de Polignac number, because 51961471129 - 2²³ = 51953082521 is a prime.

It is not a weakly prime, because it can be changed into another prime (51961471123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25980735564 + 25980735565.

It is an arithmetic number, because the mean of its divisors is an integer number (25980735565).

Almost surely, 2^51961471129 is an apocalyptic number.

It is an amenable number.

51961471129 is a deficient number, since it is larger than the sum of its proper divisors (1).

51961471129 is an equidigital number, since it uses as much as digits as its factorization.

51961471129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 46.

The spelling of 51961471129 in words is "fifty-one billion, nine hundred sixty-one million, four hundred seventy-one thousand, one hundred twenty-nine".