445545442213 has 8 divisors (see below), whose sum is σ = 447117548760. Its totient is φ = 443976069120.

The previous prime is 445545442211. The next prime is 445545442229. The reversal of 445545442213 is 312244545544.

It can be written as a sum of positive squares in 4 ways, for example, as 332072130049 + 113473312164 = 576257^2 + 336858^2 .

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 445545442213 - 2¹ = 445545442211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445545442213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445545442211) 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, 356520 + ... + 1009057.

It is an arithmetic number, because the mean of its divisors is an integer number (55889693595).

Almost surely, 2^445545442213 is an apocalyptic number.

It is an amenable number.

445545442213 is a deficient number, since it is larger than the sum of its proper divisors (1572106547).

445545442213 is a wasteful number, since it uses less digits than its factorization.

445545442213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366727.

The product of its digits is 1536000, while the sum is 43.

Adding to 445545442213 its reverse (312244545544), we get a palindrome (757789987757).

The spelling of 445545442213 in words is "four hundred forty-five billion, five hundred forty-five million, four hundred forty-two thousand, two hundred thirteen".