1161516605 has 8 divisors (see below), whose sum is σ = 1395130200. Its totient is φ = 928339776.

The previous prime is 1161516581. The next prime is 1161516667. The reversal of 1161516605 is 5066151611.

It can be written as a sum of positive squares in 4 ways, for example, as 228947161 + 932569444 = 15131^2 + 30538^2 .

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 1161516605 - 2⁶ = 1161516541 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 103310 + ... + 113999.

It is an arithmetic number, because the mean of its divisors is an integer number (174391275).

Almost surely, 2^1161516605 is an apocalyptic number.

It is an amenable number.

1161516605 is a deficient number, since it is larger than the sum of its proper divisors (233613595).

1161516605 is a wasteful number, since it uses less digits than its factorization.

1161516605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218383.

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

The square root of 1161516605 is about 34081.0299873698. The cubic root of 1161516605 is about 1051.1752841434.

The spelling of 1161516605 in words is "one billion, one hundred sixty-one million, five hundred sixteen thousand, six hundred five".