161606606555165 has 8 divisors (see below), whose sum is σ = 194782235919840. Its totient is φ = 128715746541712.

The previous prime is 161606606555089. The next prime is 161606606555167. The reversal of 161606606555165 is 561555606606161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161606606555165 - 2¹⁴ = 161606606538781 is a prime.

It is a super-2 number, since 2×161606606555165² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606606555167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71192336555 + ... + 71192338824.

It is an arithmetic number, because the mean of its divisors is an integer number (24347779489980).

Almost surely, 2^{161606606555165} is an apocalyptic number.

It is an amenable number.

161606606555165 is a deficient number, since it is larger than the sum of its proper divisors (33175629364675).

161606606555165 is a wasteful number, since it uses less digits than its factorization.

161606606555165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142384675611.

The product of its (nonzero) digits is 29160000, while the sum is 59.

The spelling of 161606606555165 in words is "one hundred sixty-one trillion, six hundred six billion, six hundred six million, five hundred fifty-five thousand, one hundred sixty-five".