161405676137 has 2 divisors, whose sum is σ = 161405676138. Its totient is φ = 161405676136.

The previous prime is 161405676073. The next prime is 161405676143. The reversal of 161405676137 is 731676504161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161113129321 + 292546816 = 401389^2 + 17104^2 .

It is a cyclic number.

It is not a de Polignac number, because 161405676137 - 2⁶ = 161405676073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161405676091 and 161405676100.

It is not a weakly prime, because it can be changed into another prime (161405676337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80702838068 + 80702838069.

It is an arithmetic number, because the mean of its divisors is an integer number (80702838069).

Almost surely, 2^161405676137 is an apocalyptic number.

It is an amenable number.

161405676137 is a deficient number, since it is larger than the sum of its proper divisors (1).

161405676137 is an equidigital number, since it uses as much as digits as its factorization.

161405676137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 161405676137 in words is "one hundred sixty-one billion, four hundred five million, six hundred seventy-six thousand, one hundred thirty-seven".