51663141161 has 2 divisors, whose sum is σ = 51663141162. Its totient is φ = 51663141160.

The previous prime is 51663141077. The next prime is 51663141169. The reversal of 51663141161 is 16114136615.

51663141161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27620778025 + 24042363136 = 166195^2 + 155056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51663141161 is a prime.

It is not a weakly prime, because it can be changed into another prime (51663141169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25831570580 + 25831570581.

It is an arithmetic number, because the mean of its divisors is an integer number (25831570581).

Almost surely, 2^51663141161 is an apocalyptic number.

It is an amenable number.

51663141161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51663141161 is an equidigital number, since it uses as much as digits as its factorization.

51663141161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

Adding to 51663141161 its reverse (16114136615), we get a palindrome (67777277776).

The spelling of 51663141161 in words is "fifty-one billion, six hundred sixty-three million, one hundred forty-one thousand, one hundred sixty-one".