1118678563 has 4 divisors (see below), whose sum is σ = 1145963448. Its totient is φ = 1091393680.

The previous prime is 1118678551. The next prime is 1118678581. The reversal of 1118678563 is 3658768111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3658768111 = 1217 ⋅3006383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118678563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1118678503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13642381 + ... + 13642462.

It is an arithmetic number, because the mean of its divisors is an integer number (286490862).

Almost surely, 2^1118678563 is an apocalyptic number.

1118678563 is a deficient number, since it is larger than the sum of its proper divisors (27284885).

1118678563 is an equidigital number, since it uses as much as digits as its factorization.

1118678563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27284884.

The product of its digits is 241920, while the sum is 46.

The square root of 1118678563 is about 33446.6524931868. The cubic root of 1118678563 is about 1038.0902338141.

The spelling of 1118678563 in words is "one billion, one hundred eighteen million, six hundred seventy-eight thousand, five hundred sixty-three".