2216426405645 has 8 divisors (see below), whose sum is σ = 2659731146520. Its totient is φ = 1773128151360.

The previous prime is 2216426405639. The next prime is 2216426405647. The reversal of 2216426405645 is 5465046246122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 433170636649 + 1783255768996 = 658157^2 + 1335386^2 .

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

It is not a de Polignac number, because 2216426405645 - 2⁶ = 2216426405581 is a prime.

It is a super-3 number, since 3×2216426405645³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2216426405645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216426405647) 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, 835250 + ... + 2265059.

It is an arithmetic number, because the mean of its divisors is an integer number (332466393315).

Almost surely, 2^{2216426405645} is an apocalyptic number.

It is an amenable number.

2216426405645 is a deficient number, since it is larger than the sum of its proper divisors (443304740875).

2216426405645 is a wasteful number, since it uses less digits than its factorization.

2216426405645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243295.

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 2216426405645 in words is "two trillion, two hundred sixteen billion, four hundred twenty-six million, four hundred five thousand, six hundred forty-five".