161532316129 has 2 divisors, whose sum is σ = 161532316130. Its totient is φ = 161532316128.

The previous prime is 161532316111. The next prime is 161532316139. The reversal of 161532316129 is 921613235161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150561848529 + 10970467600 = 388023^2 + 104740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161532316129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161532316091 and 161532316100.

It is not a weakly prime, because it can be changed into another prime (161532316139) 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, 80766158064 + 80766158065.

It is an arithmetic number, because the mean of its divisors is an integer number (80766158065).

Almost surely, 2^161532316129 is an apocalyptic number.

It is an amenable number.

161532316129 is a deficient number, since it is larger than the sum of its proper divisors (1).

161532316129 is an equidigital number, since it uses as much as digits as its factorization.

161532316129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The spelling of 161532316129 in words is "one hundred sixty-one billion, five hundred thirty-two million, three hundred sixteen thousand, one hundred twenty-nine".