1170655565 has 4 divisors (see below), whose sum is σ = 1404786684. Its totient is φ = 936524448.

The previous prime is 1170655559. The next prime is 1170655567. The reversal of 1170655565 is 5655560711.

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 776513956 + 394141609 = 27866^2 + 19853^2 .

It is a cyclic number.

It is not a de Polignac number, because 1170655565 - 2²⁶ = 1103546701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170655567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117065552 + ... + 117065561.

It is an arithmetic number, because the mean of its divisors is an integer number (351196671).

Almost surely, 2^1170655565 is an apocalyptic number.

It is an amenable number.

1170655565 is a deficient number, since it is larger than the sum of its proper divisors (234131119).

1170655565 is an equidigital number, since it uses as much as digits as its factorization.

1170655565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234131118.

The product of its (nonzero) digits is 157500, while the sum is 41.

The square root of 1170655565 is about 34214.8442200166. The cubic root of 1170655565 is about 1053.9250117980.

The spelling of 1170655565 in words is "one billion, one hundred seventy million, six hundred fifty-five thousand, five hundred sixty-five".