161065552330345 has 12 divisors (see below), whose sum is σ = 209289912969996. Its totient is φ = 118940715566400.

The previous prime is 161065552330271. The next prime is 161065552330399. The reversal of 161065552330345 is 543033255560161.

It can be written as a sum of positive squares in 6 ways, for example, as 6647749492329 + 154417802838016 = 2578323^2 + 12426496^2 .

It is not a de Polignac number, because 161065552330345 - 2⁷ = 161065552330217 is a prime.

It is a super-2 number, since 2×161065552330345² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95305059706 + ... + 95305061395.

It is an arithmetic number, because the mean of its divisors is an integer number (17440826080833).

Almost surely, 2^{161065552330345} is an apocalyptic number.

It is an amenable number.

161065552330345 is a deficient number, since it is larger than the sum of its proper divisors (48224360639651).

161065552330345 is a wasteful number, since it uses less digits than its factorization.

161065552330345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190610121132 (or 190610121119 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 49.

The spelling of 161065552330345 in words is "one hundred sixty-one trillion, sixty-five billion, five hundred fifty-two million, three hundred thirty thousand, three hundred forty-five".