16140635165 has 4 divisors (see below), whose sum is σ = 19368762204. Its totient is φ = 12912508128.

The previous prime is 16140635153. The next prime is 16140635179. The reversal of 16140635165 is 56153604161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56153604161 = 177383 ⋅316567.

It can be written as a sum of positive squares in 2 ways, for example, as 5512468516 + 10628166649 = 74246^2 + 103093^2 .

It is a cyclic number.

It is not a de Polignac number, because 16140635165 - 2⁴ = 16140635149 is a prime.

It is a Duffinian number.

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, 1614063512 + ... + 1614063521.

It is an arithmetic number, because the mean of its divisors is an integer number (4842190551).

Almost surely, 2^16140635165 is an apocalyptic number.

It is an amenable number.

16140635165 is a deficient number, since it is larger than the sum of its proper divisors (3228127039).

16140635165 is an equidigital number, since it uses as much as digits as its factorization.

16140635165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228127038.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 16140635165 in words is "sixteen billion, one hundred forty million, six hundred thirty-five thousand, one hundred sixty-five".