8445555447 has 16 divisors (see below), whose sum is σ = 12870723840. Its totient is φ = 4825541952.

The previous prime is 8445555397. The next prime is 8445555467. The reversal of 8445555447 is 7445555448.

It is not a de Polignac number, because 8445555447 - 2⁷ = 8445555319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8445555447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8445555467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337204 + ... + 361382.

It is an arithmetic number, because the mean of its divisors is an integer number (804420240).

Almost surely, 2^8445555447 is an apocalyptic number.

8445555447 is a deficient number, since it is larger than the sum of its proper divisors (4425168393).

8445555447 is a wasteful number, since it uses less digits than its factorization.

8445555447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40822.

The product of its digits is 8960000, while the sum is 51.

The square root of 8445555447 is about 91899.7031932095. The cubic root of 8445555447 is about 2036.4608833306.

Subtracting from 8445555447 its reverse (7445555448), we obtain a palindrome (999999999).

The spelling of 8445555447 in words is "eight billion, four hundred forty-five million, five hundred fifty-five thousand, four hundred forty-seven".