161606010565019 has 2 divisors, whose sum is σ = 161606010565020. Its totient is φ = 161606010565018.

The previous prime is 161606010565009. The next prime is 161606010565079. The reversal of 161606010565019 is 910565010606161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161606010565019 - 2¹² = 161606010560923 is a prime.

It is a super-2 number, since 2×161606010565019² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161606010565009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80803005282509 + 80803005282510.

It is an arithmetic number, because the mean of its divisors is an integer number (80803005282510).

Almost surely, 2^{161606010565019} is an apocalyptic number.

161606010565019 is a deficient number, since it is larger than the sum of its proper divisors (1).

161606010565019 is an equidigital number, since it uses as much as digits as its factorization.

161606010565019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 161606010565019 in words is "one hundred sixty-one trillion, six hundred six billion, ten million, five hundred sixty-five thousand, nineteen".