161606155014539 has 2 divisors, whose sum is σ = 161606155014540. Its totient is φ = 161606155014538.

The previous prime is 161606155014509. The next prime is 161606155014607. The reversal of 161606155014539 is 935410551606161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161606155014539 - 2⁴⁰ = 160506643386763 is a prime.

It is a super-2 number, since 2×161606155014539² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161606155014509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80803077507269 + 80803077507270.

It is an arithmetic number, because the mean of its divisors is an integer number (80803077507270).

Almost surely, 2^{161606155014539} is an apocalyptic number.

161606155014539 is a deficient number, since it is larger than the sum of its proper divisors (1).

161606155014539 is an equidigital number, since it uses as much as digits as its factorization.

161606155014539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916000, while the sum is 53.

The spelling of 161606155014539 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred fifty-five million, fourteen thousand, five hundred thirty-nine".