8136343945 has 4 divisors (see below), whose sum is σ = 9763612740. Its totient is φ = 6509075152.

The previous prime is 8136343921. The next prime is 8136343987. The reversal of 8136343945 is 5493436318.

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 3876432121 + 4259911824 = 62261^2 + 65268^2 .

It is a cyclic number.

It is not a de Polignac number, because 8136343945 - 2¹¹ = 8136341897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8136343895 and 8136343904.

It is an unprimeable number.

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, 813634390 + ... + 813634399.

It is an arithmetic number, because the mean of its divisors is an integer number (2440903185).

Almost surely, 2^8136343945 is an apocalyptic number.

It is an amenable number.

8136343945 is a deficient number, since it is larger than the sum of its proper divisors (1627268795).

8136343945 is a wasteful number, since it uses less digits than its factorization.

8136343945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627268794.

The product of its digits is 933120, while the sum is 46.

The square root of 8136343945 is about 90201.6848235109. The cubic root of 8136343945 is about 2011.2980522451.

The spelling of 8136343945 in words is "eight billion, one hundred thirty-six million, three hundred forty-three thousand, nine hundred forty-five".