1516605161 has 4 divisors (see below), whose sum is σ = 1516877712. Its totient is φ = 1516332612.

The previous prime is 1516605151. The next prime is 1516605217. The reversal of 1516605161 is 1615066151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1615066151 = 3547 ⋅455333.

It is a cyclic number.

It is not a de Polignac number, because 1516605161 - 2²⁶ = 1449496297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1516605151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127751 + ... + 139116.

It is an arithmetic number, because the mean of its divisors is an integer number (379219428).

Almost surely, 2^1516605161 is an apocalyptic number.

It is an amenable number.

1516605161 is a deficient number, since it is larger than the sum of its proper divisors (272551).

1516605161 is an equidigital number, since it uses as much as digits as its factorization.

1516605161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272550.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1516605161 is about 38943.6151506251. The cubic root of 1516605161 is about 1148.9227873761.

The spelling of 1516605161 in words is "one billion, five hundred sixteen million, six hundred five thousand, one hundred sixty-one".