1165105155 has 32 divisors (see below), whose sum is σ = 1899371520. Its totient is φ = 609696000.

The previous prime is 1165105153. The next prime is 1165105177. The reversal of 1165105155 is 5515015611.

It is not a de Polignac number, because 1165105155 - 2¹ = 1165105153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165105153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 663759 + ... + 665511.

It is an arithmetic number, because the mean of its divisors is an integer number (59355360).

Almost surely, 2^1165105155 is an apocalyptic number.

1165105155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1165105155 is a deficient number, since it is larger than the sum of its proper divisors (734266365).

1165105155 is a wasteful number, since it uses less digits than its factorization.

1165105155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571.

The product of its (nonzero) digits is 3750, while the sum is 30.

The square root of 1165105155 is about 34133.6367092638. The cubic root of 1165105155 is about 1052.2567199500.

The spelling of 1165105155 in words is "one billion, one hundred sixty-five million, one hundred five thousand, one hundred fifty-five".