8188612345 has 4 divisors (see below), whose sum is σ = 9826334820. Its totient is φ = 6550889872.

The previous prime is 8188612337. The next prime is 8188612349. The reversal of 8188612345 is 5432168818.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1866931264 + 6321681081 = 43208^2 + 79509^2 .

It is a cyclic number.

It is not a de Polignac number, because 8188612345 - 2³ = 8188612337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8188612295 and 8188612304.

It is not an unprimeable number, because it can be changed into a prime (8188612349) 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 3 ways as a sum of consecutive naturals, for example, 818861230 + ... + 818861239.

It is an arithmetic number, because the mean of its divisors is an integer number (2456583705).

Almost surely, 2^8188612345 is an apocalyptic number.

It is an amenable number.

8188612345 is a deficient number, since it is larger than the sum of its proper divisors (1637722475).

8188612345 is a wasteful number, since it uses less digits than its factorization.

8188612345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637722474.

The product of its digits is 368640, while the sum is 46.

The square root of 8188612345 is about 90490.9517299934. The cubic root of 8188612345 is about 2015.5957653577.

The spelling of 8188612345 in words is "eight billion, one hundred eighty-eight million, six hundred twelve thousand, three hundred forty-five".