1165351645 has 4 divisors (see below), whose sum is σ = 1398421980. Its totient is φ = 932281312.

The previous prime is 1165351639. The next prime is 1165351687. The reversal of 1165351645 is 5461535611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 774063684 + 391287961 = 27822^2 + 19781^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165351645 - 2³ = 1165351637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116535160 + ... + 116535169.

It is an arithmetic number, because the mean of its divisors is an integer number (349605495).

Almost surely, 2^1165351645 is an apocalyptic number.

It is an amenable number.

1165351645 is a deficient number, since it is larger than the sum of its proper divisors (233070335).

1165351645 is an equidigital number, since it uses as much as digits as its factorization.

1165351645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233070334.

The product of its digits is 54000, while the sum is 37.

The square root of 1165351645 is about 34137.2471795838. The cubic root of 1165351645 is about 1052.3309199679.

The spelling of 1165351645 in words is "one billion, one hundred sixty-five million, three hundred fifty-one thousand, six hundred forty-five".