546605166541561 has 8 divisors (see below), whose sum is σ = 549437978389320. Its totient is φ = 543772361505792.

The previous prime is 546605166541453. The next prime is 546605166541639. The reversal of 546605166541561 is 165145661506645.

It can be written as a sum of positive squares in 4 ways, for example, as 89960577410025 + 456644589131536 = 9484755^2 + 21369244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-546605166541561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 546605166541561.

It is not an unprimeable number, because it can be changed into a prime (546605166545561) 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, 277453551 + ... + 279416683.

It is an arithmetic number, because the mean of its divisors is an integer number (68679747298665).

Almost surely, 2^{546605166541561} is an apocalyptic number.

It is an amenable number.

546605166541561 is a deficient number, since it is larger than the sum of its proper divisors (2832811847759).

546605166541561 is a wasteful number, since it uses less digits than its factorization.

546605166541561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405995.

The product of its (nonzero) digits is 77760000, while the sum is 61.

The spelling of 546605166541561 in words is "five hundred forty-six trillion, six hundred five billion, one hundred sixty-six million, five hundred forty-one thousand, five hundred sixty-one".