1165623055 has 4 divisors (see below), whose sum is σ = 1398747672. Its totient is φ = 932498440.

The previous prime is 1165623031. The next prime is 1165623061. The reversal of 1165623055 is 5503265611.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1165623055 - 2⁵ = 1165623023 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 1165623055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116562301 + ... + 116562310.

It is an arithmetic number, because the mean of its divisors is an integer number (349686918).

Almost surely, 2^1165623055 is an apocalyptic number.

1165623055 is a deficient number, since it is larger than the sum of its proper divisors (233124617).

1165623055 is an equidigital number, since it uses as much as digits as its factorization.

1165623055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233124616.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1165623055 is about 34141.2222247535. Note that the first 5 decimals coincide. The cubic root of 1165623055 is about 1052.4126094637.

Adding to 1165623055 its reverse (5503265611), we get a palindrome (6668888666).

The spelling of 1165623055 in words is "one billion, one hundred sixty-five million, six hundred twenty-three thousand, fifty-five".