8644933145 has 4 divisors (see below), whose sum is σ = 10373919780. Its totient is φ = 6915946512.

The previous prime is 8644933133. The next prime is 8644933153. The reversal of 8644933145 is 5413394468.

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 6232944601 + 2411988544 = 78949^2 + 49112^2 .

It is a cyclic number.

It is not a de Polignac number, because 8644933145 - 2⁸ = 8644932889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8644933145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864493310 + ... + 864493319.

It is an arithmetic number, because the mean of its divisors is an integer number (2593479945).

Almost surely, 2^8644933145 is an apocalyptic number.

It is an amenable number.

8644933145 is a deficient number, since it is larger than the sum of its proper divisors (1728986635).

8644933145 is a wasteful number, since it uses less digits than its factorization.

8644933145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728986634.

The product of its digits is 1244160, while the sum is 47.

The square root of 8644933145 is about 92978.1326172988. The cubic root of 8644933145 is about 2052.3615968606.

The spelling of 8644933145 in words is "eight billion, six hundred forty-four million, nine hundred thirty-three thousand, one hundred forty-five".