555321581845 has 4 divisors (see below), whose sum is σ = 666385898220. Its totient is φ = 444257265472.

The previous prime is 555321581809. The next prime is 555321581849. The reversal of 555321581845 is 548185123555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 288246576996 + 267075004849 = 536886^2 + 516793^2 .

It is a cyclic number.

It is not a de Polignac number, because 555321581845 - 2²¹ = 555319484693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 555321581792 and 555321581801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555321581849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55532158180 + ... + 55532158189.

It is an arithmetic number, because the mean of its divisors is an integer number (166596474555).

Almost surely, 2^555321581845 is an apocalyptic number.

It is an amenable number.

555321581845 is a deficient number, since it is larger than the sum of its proper divisors (111064316375).

555321581845 is a wasteful number, since it uses less digits than its factorization.

555321581845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111064316374.

The product of its digits is 4800000, while the sum is 52.

The spelling of 555321581845 in words is "five hundred fifty-five billion, three hundred twenty-one million, five hundred eighty-one thousand, eight hundred forty-five".