1165775563 has 8 divisors (see below), whose sum is σ = 1173574160. Its totient is φ = 1158001920.

The previous prime is 1165775549. The next prime is 1165775573. The reversal of 1165775563 is 3655775611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1165775563 - 2⁵ = 1165775531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165775503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92656 + ... + 104482.

It is an arithmetic number, because the mean of its divisors is an integer number (146696770).

Almost surely, 2^1165775563 is an apocalyptic number.

1165775563 is a deficient number, since it is larger than the sum of its proper divisors (7798597).

1165775563 is a wasteful number, since it uses less digits than its factorization.

1165775563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12477.

The product of its digits is 661500, while the sum is 46.

The square root of 1165775563 is about 34143.4556394047. The cubic root of 1165775563 is about 1052.4585060458.

The spelling of 1165775563 in words is "one billion, one hundred sixty-five million, seven hundred seventy-five thousand, five hundred sixty-three".