8643143394 has 40 divisors (see below), whose sum is σ = 19639844928. Its totient is φ = 2840465880.

The previous prime is 8643143393. The next prime is 8643143429. The reversal of 8643143394 is 4933413468.

8643143394 is a `hidden beast` number, since 86 + 43 + 143 + 394 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8643143393) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 364222 + ... + 387225.

Almost surely, 2^8643143394 is an apocalyptic number.

8643143394 is an abundant number, since it is smaller than the sum of its proper divisors (10996701534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8643143394 is a wasteful number, since it uses less digits than its factorization.

8643143394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751532 (or 751523 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 8643143394 is about 92968.5075388435. The cubic root of 8643143394 is about 2052.2199543641.

The spelling of 8643143394 in words is "eight billion, six hundred forty-three million, one hundred forty-three thousand, three hundred ninety-four".