1118678643 has 24 divisors (see below), whose sum is σ = 1633424832. Its totient is φ = 737710848.

The previous prime is 1118678633. The next prime is 1118678651. The reversal of 1118678643 is 3468768111.

It is not a de Polignac number, because 1118678643 - 2⁹ = 1118678131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1118678633) 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 23 ways as a sum of consecutive naturals, for example, 785430 + ... + 786852.

It is an arithmetic number, because the mean of its divisors is an integer number (68059368).

Almost surely, 2^1118678643 is an apocalyptic number.

1118678643 is a deficient number, since it is larger than the sum of its proper divisors (514746189).

1118678643 is a wasteful number, since it uses less digits than its factorization.

1118678643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315 (or 2312 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1118678643 is about 33446.6536891211. The cubic root of 1118678643 is about 1038.0902585597.

The spelling of 1118678643 in words is "one billion, one hundred eighteen million, six hundred seventy-eight thousand, six hundred forty-three".