8406198505 has 8 divisors (see below), whose sum is σ = 10680817032. Its totient is φ = 6329372928.

The previous prime is 8406198503. The next prime is 8406198509. The reversal of 8406198505 is 5058916048.

It can be written as a sum of positive squares in 4 ways, for example, as 409010176 + 7997188329 = 20224^2 + 89427^2 .

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 8406198505 - 2¹ = 8406198503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8406198503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49448142 + ... + 49448311.

It is an arithmetic number, because the mean of its divisors is an integer number (1335102129).

Almost surely, 2^8406198505 is an apocalyptic number.

8406198505 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8406198505 is a deficient number, since it is larger than the sum of its proper divisors (2274618527).

8406198505 is a wasteful number, since it uses less digits than its factorization.

8406198505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98896475.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 8406198505 is about 91685.3232802284. The cubic root of 8406198505 is about 2033.2926016356.

The spelling of 8406198505 in words is "eight billion, four hundred six million, one hundred ninety-eight thousand, five hundred five".