1145165545 has 4 divisors (see below), whose sum is σ = 1374198660. Its totient is φ = 916132432.

The previous prime is 1145165501. The next prime is 1145165557. The reversal of 1145165545 is 5455615411.

1145165545 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135769104 + 1009396441 = 11652^2 + 31771^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145165545 - 2¹³ = 1145157353 is a prime.

It is a super-2 number, since 2×1145165545² = 2622808250910294050, which contains 22 as substring.

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, 114516550 + ... + 114516559.

It is an arithmetic number, because the mean of its divisors is an integer number (343549665).

Almost surely, 2^1145165545 is an apocalyptic number.

It is an amenable number.

1145165545 is a deficient number, since it is larger than the sum of its proper divisors (229033115).

1145165545 is an equidigital number, since it uses as much as digits as its factorization.

1145165545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229033114.

The product of its digits is 60000, while the sum is 37.

The square root of 1145165545 is about 33840.2946943433. The cubic root of 1145165545 is about 1046.2193728316.

The spelling of 1145165545 in words is "one billion, one hundred forty-five million, one hundred sixty-five thousand, five hundred forty-five".