10165561009 has 4 divisors (see below), whose sum is σ = 10763535204. Its totient is φ = 9567586816.

The previous prime is 10165560947. The next prime is 10165561027. The reversal of 10165561009 is 90016556101.

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 9311285025 + 854275984 = 96495^2 + 29228^2 .

It is a cyclic number.

It is not a de Polignac number, because 10165561009 - 2⁹ = 10165560497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10165561309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298987072 + ... + 298987105.

It is an arithmetic number, because the mean of its divisors is an integer number (2690883801).

Almost surely, 2^10165561009 is an apocalyptic number.

It is an amenable number.

10165561009 is a deficient number, since it is larger than the sum of its proper divisors (597974195).

10165561009 is an equidigital number, since it uses as much as digits as its factorization.

10165561009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597974194.

The product of its (nonzero) digits is 8100, while the sum is 34.

The spelling of 10165561009 in words is "ten billion, one hundred sixty-five million, five hundred sixty-one thousand, nine".