1165516161 has 8 divisors (see below), whose sum is σ = 1590161760. Its totient is φ = 758940672.

The previous prime is 1165516153. The next prime is 1165516201. The reversal of 1165516161 is 1616155611.

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

It is not a de Polignac number, because 1165516161 - 2³ = 1165516153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165516361) 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, 4517376 + ... + 4517633.

It is an arithmetic number, because the mean of its divisors is an integer number (198770220).

Almost surely, 2^1165516161 is an apocalyptic number.

It is an amenable number.

1165516161 is a deficient number, since it is larger than the sum of its proper divisors (424645599).

1165516161 is an equidigital number, since it uses as much as digits as its factorization.

1165516161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9035055.

The product of its digits is 5400, while the sum is 33.

The square root of 1165516161 is about 34139.6567205940. The cubic root of 1165516161 is about 1052.3804378189.

The spelling of 1165516161 in words is "one billion, one hundred sixty-five million, five hundred sixteen thousand, one hundred sixty-one".