8438081855 has 16 divisors (see below), whose sum is σ = 11678399040. Its totient is φ = 5733027072.

The previous prime is 8438081819. The next prime is 8438081857. The reversal of 8438081855 is 5581808348.

It is a cyclic number.

It is not a de Polignac number, because 8438081855 - 2⁶ = 8438081791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8438081857) 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, 1102094 + ... + 1109723.

It is an arithmetic number, because the mean of its divisors is an integer number (729899940).

Almost surely, 2^8438081855 is an apocalyptic number.

8438081855 is a deficient number, since it is larger than the sum of its proper divisors (3240317185).

8438081855 is a wasteful number, since it uses less digits than its factorization.

8438081855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211938.

The product of its (nonzero) digits is 1228800, while the sum is 50.

The square root of 8438081855 is about 91859.0325172217. The cubic root of 8438081855 is about 2035.8600083324.

The spelling of 8438081855 in words is "eight billion, four hundred thirty-eight million, eighty-one thousand, eight hundred fifty-five".