161605565005015 has 8 divisors (see below), whose sum is σ = 198436600750608. Its totient is φ = 126277836840960.

The previous prime is 161605565004943. The next prime is 161605565005019. The reversal of 161605565005015 is 510500565506161.

It is a happy number.

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

It is not a de Polignac number, because 161605565005015 - 2²⁷ = 161605430787287 is a prime.

It is a super-2 number, since 2×161605565005015² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161605565005019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375826895146 + ... + 375826895575.

It is an arithmetic number, because the mean of its divisors is an integer number (24804575093826).

Almost surely, 2^{161605565005015} is an apocalyptic number.

161605565005015 is a deficient number, since it is larger than the sum of its proper divisors (36831035745593).

161605565005015 is an equidigital number, since it uses as much as digits as its factorization.

161605565005015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751653790769.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 161605565005015 in words is "one hundred sixty-one trillion, six hundred five billion, five hundred sixty-five million, five thousand, fifteen".