51006605161 has 2 divisors, whose sum is σ = 51006605162. Its totient is φ = 51006605160.

The previous prime is 51006605159. The next prime is 51006605179. The reversal of 51006605161 is 16150660015.

51006605161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39618513936 + 11388091225 = 199044^2 + 106715^2 .

It is a cyclic number.

It is not a de Polignac number, because 51006605161 - 2¹ = 51006605159 is a prime.

Together with 51006605159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51006605101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25503302580 + 25503302581.

It is an arithmetic number, because the mean of its divisors is an integer number (25503302581).

Almost surely, 2^51006605161 is an apocalyptic number.

It is an amenable number.

51006605161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51006605161 is an equidigital number, since it uses as much as digits as its factorization.

51006605161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 51006605161 in words is "fifty-one billion, six million, six hundred five thousand, one hundred sixty-one".