6442213445 has 8 divisors (see below), whose sum is σ = 7731160344. Its totient is φ = 5153434624.

The previous prime is 6442213433. The next prime is 6442213493. The reversal of 6442213445 is 5443122446.

It can be written as a sum of positive squares in 4 ways, for example, as 1529044609 + 4913168836 = 39103^2 + 70094^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6442213445 - 2¹⁸ = 6441951301 is a prime.

It is a super-2 number, since 2×6442213445² = 83004228141877536050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68957 + ... + 132813.

It is an arithmetic number, because the mean of its divisors is an integer number (966395043).

Almost surely, 2^6442213445 is an apocalyptic number.

It is an amenable number.

6442213445 is a deficient number, since it is larger than the sum of its proper divisors (1288946899).

6442213445 is a wasteful number, since it uses less digits than its factorization.

6442213445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84039.

The product of its digits is 92160, while the sum is 35.

The square root of 6442213445 is about 80263.4004076578. The cubic root of 6442213445 is about 1860.7086216785.

Subtracting from 6442213445 its reverse (5443122446), we obtain a palindrome (999090999).

The spelling of 6442213445 in words is "six billion, four hundred forty-two million, two hundred thirteen thousand, four hundred forty-five".