545561222165545 has 16 divisors (see below), whose sum is σ = 655588846797840. Its totient is φ = 435838820684800.

The previous prime is 545561222165539. The next prime is 545561222165567.

545561222165545 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 46572476306409 + 498988745859136 = 6824403^2 + 22338056^2 .

It is not a de Polignac number, because 545561222165545 - 2¹⁷ = 545561222034473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 545561222165545.

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, 39293925 + ... + 51333565.

It is an arithmetic number, because the mean of its divisors is an integer number (40974302924865).

Almost surely, 2^{545561222165545} is an apocalyptic number.

It is an amenable number.

545561222165545 is a deficient number, since it is larger than the sum of its proper divisors (110027624632295).

545561222165545 is a wasteful number, since it uses less digits than its factorization.

545561222165545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12052316.

The product of its digits is 72000000, while the sum is 58.

The spelling of 545561222165545 in words is "five hundred forty-five trillion, five hundred sixty-one billion, two hundred twenty-two million, one hundred sixty-five thousand, five hundred forty-five".