1163043665 has 24 divisors (see below), whose sum is σ = 1645779240. Its totient is φ = 786578688.

The previous prime is 1163043659. The next prime is 1163043671. The reversal of 1163043665 is 5663403611.

It is an interprime number because it is at equal distance from previous prime (1163043659) and next prime (1163043671).

It can be written as a sum of positive squares in 4 ways, for example, as 529414081 + 633629584 = 23009^2 + 25172^2 .

It is not a de Polignac number, because 1163043665 - 2²⁰ = 1161995089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14630 + ... + 50399.

It is an arithmetic number, because the mean of its divisors is an integer number (68574135).

Almost surely, 2^1163043665 is an apocalyptic number.

It is an amenable number.

1163043665 is a deficient number, since it is larger than the sum of its proper divisors (482735575).

1163043665 is an equidigital number, since it uses as much as digits as its factorization.

1163043665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65121 (or 65114 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 1163043665 is about 34103.4260009167. The cubic root of 1163043665 is about 1051.6357467184.

The spelling of 1163043665 in words is "one billion, one hundred sixty-three million, forty-three thousand, six hundred sixty-five".