1165552065 has 16 divisors (see below), whose sum is σ = 2072092800. Its totient is φ = 621627696.

The previous prime is 1165552061. The next prime is 1165552081. The reversal of 1165552065 is 5602555611.

1165552065 is a `hidden beast` number, since 11 + 65 + 5 + 520 + 65 = 666.

It is not a de Polignac number, because 1165552065 - 2² = 1165552061 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1165552061) 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, 4316725 + ... + 4316994.

It is an arithmetic number, because the mean of its divisors is an integer number (129505800).

Almost surely, 2^1165552065 is an apocalyptic number.

1165552065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1165552065 is a deficient number, since it is larger than the sum of its proper divisors (906540735).

1165552065 is an equidigital number, since it uses as much as digits as its factorization.

1165552065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8633733 (or 8633727 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1165552065 is about 34140.1825566297. The cubic root of 1165552065 is about 1052.3912439837.

The spelling of 1165552065 in words is "one billion, one hundred sixty-five million, five hundred fifty-two thousand, sixty-five".