1165155063 has 4 divisors (see below), whose sum is σ = 1553540088. Its totient is φ = 776770040.

The previous prime is 1165155059. The next prime is 1165155067. The reversal of 1165155063 is 3605515611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3605515611 = 3 ⋅1201838537.

It is an interprime number because it is at equal distance from previous prime (1165155059) and next prime (1165155067).

It is a cyclic number.

It is not a de Polignac number, because 1165155063 - 2² = 1165155059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165155067) by changing a digit.

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, 194192508 + ... + 194192513.

It is an arithmetic number, because the mean of its divisors is an integer number (388385022).

Almost surely, 2^1165155063 is an apocalyptic number.

1165155063 is a deficient number, since it is larger than the sum of its proper divisors (388385025).

1165155063 is an equidigital number, since it uses as much as digits as its factorization.

1165155063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388385024.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 1165155063 is about 34134.3677691561. The cubic root of 1165155063 is about 1052.2717444246.

The spelling of 1165155063 in words is "one billion, one hundred sixty-five million, one hundred fifty-five thousand, sixty-three".