2220056645 has 8 divisors (see below), whose sum is σ = 2664475800. Its totient is φ = 1775773440.

The previous prime is 2220056617. The next prime is 2220056681. The reversal of 2220056645 is 5466500222.

It can be written as a sum of positive squares in 4 ways, for example, as 61246276 + 2158810369 = 7826^2 + 46463^2 .

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

It is not a de Polignac number, because 2220056645 - 2²⁶ = 2152947781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6281 + ... + 66929.

It is an arithmetic number, because the mean of its divisors is an integer number (333059475).

Almost surely, 2^2220056645 is an apocalyptic number.

It is an amenable number.

2220056645 is a deficient number, since it is larger than the sum of its proper divisors (444419155).

2220056645 is an equidigital number, since it uses as much as digits as its factorization.

2220056645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67975.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 2220056645 is about 47117.4770653099. The cubic root of 2220056645 is about 1304.5318452081.

Adding to 2220056645 its reverse (5466500222), we get a palindrome (7686556867).

The spelling of 2220056645 in words is "two billion, two hundred twenty million, fifty-six thousand, six hundred forty-five".