165064630661605 has 16 divisors (see below), whose sum is σ = 209730417720624. Its totient is φ = 124283222425600.

The previous prime is 165064630661533. The next prime is 165064630661611. The reversal of 165064630661605 is 506166036460561.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2816979564996 + 162247651096609 = 1678386^2 + 12737647^2 .

It is not a de Polignac number, because 165064630661605 - 2⁴⁷ = 24327142306277 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 15 ways as a sum of consecutive naturals, for example, 8941005 + ... + 20250205.

It is an arithmetic number, because the mean of its divisors is an integer number (13108151107539).

Almost surely, 2^{165064630661605} is an apocalyptic number.

It is an amenable number.

165064630661605 is a deficient number, since it is larger than the sum of its proper divisors (44665787059019).

165064630661605 is a wasteful number, since it uses less digits than its factorization.

165064630661605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11480936.

The product of its (nonzero) digits is 13996800, while the sum is 55.

The spelling of 165064630661605 in words is "one hundred sixty-five trillion, sixty-four billion, six hundred thirty million, six hundred sixty-one thousand, six hundred five".