1161600065 has 32 divisors (see below), whose sum is σ = 1468938240. Its totient is φ = 880899264.

The previous prime is 1161600061. The next prime is 1161600067. The reversal of 1161600065 is 5600061611.

It is a cyclic number.

It is not a de Polignac number, because 1161600065 - 2² = 1161600061 is a prime.

It is a super-2 number, since 2×1161600065² = 2698629422016008450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1161600061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1404182 + ... + 1405008.

It is an arithmetic number, because the mean of its divisors is an integer number (45904320).

Almost surely, 2^1161600065 is an apocalyptic number.

It is an amenable number.

1161600065 is a deficient number, since it is larger than the sum of its proper divisors (307338175).

1161600065 is a wasteful number, since it uses less digits than its factorization.

1161600065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1161600065 is about 34082.2544002007. The cubic root of 1161600065 is about 1051.2004607064.

Adding to 1161600065 its reverse (5600061611), we get a palindrome (6761661676).

The spelling of 1161600065 in words is "one billion, one hundred sixty-one million, six hundred thousand, sixty-five".