165546315565441 has 8 divisors (see below), whose sum is σ = 177019822586664. Its totient is φ = 154265640595200.

The previous prime is 165546315565417. The next prime is 165546315565469. The reversal of 165546315565441 is 144565513645561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52402759050625 + 113143556514816 = 7238975^2 + 10636896^2 .

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 165546315565441 - 2²⁷ = 165546181347713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165546315565441.

It is not an unprimeable number, because it can be changed into a prime (165546315566441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48208010970 + ... + 48208014403.

It is an arithmetic number, because the mean of its divisors is an integer number (22127477823333).

Almost surely, 2^{165546315565441} is an apocalyptic number.

It is an amenable number.

165546315565441 is a deficient number, since it is larger than the sum of its proper divisors (11473507021223).

165546315565441 is a wasteful number, since it uses less digits than its factorization.

165546315565441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96416025491.

The product of its digits is 129600000, while the sum is 61.

The spelling of 165546315565441 in words is "one hundred sixty-five trillion, five hundred forty-six billion, three hundred fifteen million, five hundred sixty-five thousand, four hundred forty-one".