1165155055 has 8 divisors (see below), whose sum is σ = 1411761312. Its totient is φ = 923073888.

The previous prime is 1165155007. The next prime is 1165155059. The reversal of 1165155055 is 5505515611.

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 1165155055 - 2⁷ = 1165154927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165155055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165155059) 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 7 ways as a sum of consecutive naturals, for example, 1130704 + ... + 1131733.

It is an arithmetic number, because the mean of its divisors is an integer number (176470164).

Almost surely, 2^1165155055 is an apocalyptic number.

1165155055 is a deficient number, since it is larger than the sum of its proper divisors (246606257).

1165155055 is a wasteful number, since it uses less digits than its factorization.

1165155055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262545.

The product of its (nonzero) digits is 18750, while the sum is 34.

The square root of 1165155055 is about 34134.3676519721. The cubic root of 1165155055 is about 1052.2717420163.

The spelling of 1165155055 in words is "one billion, one hundred sixty-five million, one hundred fifty-five thousand, fifty-five".