8143861444 has 12 divisors (see below), whose sum is σ = 14252462224. Its totient is φ = 4071729384.

The previous prime is 8143861381. The next prime is 8143861487. The reversal of 8143861444 is 4441683418.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8143861444.

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, 75787 + ... + 148429.

Almost surely, 2^8143861444 is an apocalyptic number.

It is an amenable number.

8143861444 is a deficient number, since it is larger than the sum of its proper divisors (6108600780).

8143861444 is a wasteful number, since it uses less digits than its factorization.

8143861444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100674 (or 100672 counting only the distinct ones).

The product of its digits is 294912, while the sum is 43.

The square root of 8143861444 is about 90243.3457048219. The cubic root of 8143861444 is about 2011.9173015848.

The spelling of 8143861444 in words is "eight billion, one hundred forty-three million, eight hundred sixty-one thousand, four hundred forty-four".