545126505621545 has 8 divisors (see below), whose sum is σ = 654157803457224. Its totient is φ = 436097206689664.

The previous prime is 545126505621539. The next prime is 545126505621547.

545126505621545 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 74191021323241 + 470935484298304 = 8613421^2 + 21701048^2 .

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-545126505621545 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545126505621547) 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, 499125914 + ... + 500216883.

It is an arithmetic number, because the mean of its divisors is an integer number (81769725432153).

Almost surely, 2^{545126505621545} is an apocalyptic number.

It is an amenable number.

545126505621545 is a deficient number, since it is larger than the sum of its proper divisors (109031297835679).

545126505621545 is a wasteful number, since it uses less digits than its factorization.

545126505621545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999451899.

The product of its (nonzero) digits is 36000000, while the sum is 56.

The spelling of 545126505621545 in words is "five hundred forty-five trillion, one hundred twenty-six billion, five hundred five million, six hundred twenty-one thousand, five hundred forty-five".