1161320163 has 16 divisors (see below), whose sum is σ = 1616683776. Its totient is φ = 740124000.

The previous prime is 1161320123. The next prime is 1161320177. The reversal of 1161320163 is 3610231611.

It is not a de Polignac number, because 1161320163 - 2¹⁷ = 1161189091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161320123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151581 + ... + 159057.

It is an arithmetic number, because the mean of its divisors is an integer number (101042736).

Almost surely, 2^1161320163 is an apocalyptic number.

1161320163 is a deficient number, since it is larger than the sum of its proper divisors (455363613).

1161320163 is a wasteful number, since it uses less digits than its factorization.

1161320163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9754.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1161320163 is about 34078.1478810102. The cubic root of 1161320163 is about 1051.1160206435.

Adding to 1161320163 its reverse (3610231611), we get a palindrome (4771551774).

The spelling of 1161320163 in words is "one billion, one hundred sixty-one million, three hundred twenty thousand, one hundred sixty-three".