4165645549 has 8 divisors (see below), whose sum is σ = 4487668920. Its totient is φ = 3843849216.

The previous prime is 4165645537. The next prime is 4165645613. The reversal of 4165645549 is 9455465614.

It can be written as a sum of positive squares in 4 ways, for example, as 169130025 + 3996515524 = 13005^2 + 63218^2 .

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 4165645549 - 2²¹ = 4163548397 is a prime.

It is a super-2 number, since 2×4165645549² = 34705205679807022802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4165645049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17644 + ... + 92965.

It is an arithmetic number, because the mean of its divisors is an integer number (560958615).

Almost surely, 2^4165645549 is an apocalyptic number.

It is an amenable number.

4165645549 is a deficient number, since it is larger than the sum of its proper divisors (322023371).

4165645549 is a wasteful number, since it uses less digits than its factorization.

4165645549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113519.

The product of its digits is 2592000, while the sum is 49.

The square root of 4165645549 is about 64541.8124087014. The cubic root of 4165645549 is about 1609.0175131675.

The spelling of 4165645549 in words is "four billion, one hundred sixty-five million, six hundred forty-five thousand, five hundred forty-nine".