8199999955 has 16 divisors (see below), whose sum is σ = 11837594880. Its totient is φ = 5326916832.

The previous prime is 8199999931. The next prime is 8199999961. The reversal of 8199999955 is 5599999918.

It is a cyclic number.

It is not a de Polignac number, because 8199999955 - 2⁹ = 8199999443 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6164749 + ... + 6166078.

It is an arithmetic number, because the mean of its divisors is an integer number (739849680).

Almost surely, 2^8199999955 is an apocalyptic number.

8199999955 is a deficient number, since it is larger than the sum of its proper divisors (3637594925).

8199999955 is a wasteful number, since it uses less digits than its factorization.

8199999955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12330858.

The product of its digits is 106288200, while the sum is 73.

The square root of 8199999955 is about 90553.8511329032. The cubic root of 8199999955 is about 2016.5296715293.

Adding to 8199999955 its sum of digits (73), we get a palindrome (8200000028).

The spelling of 8199999955 in words is "eight billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-five".