1118578881 has 8 divisors (see below), whose sum is σ = 1704501184. Its totient is φ = 639187920.

The previous prime is 1118578871. The next prime is 1118578891. The reversal of 1118578881 is 1888758111.

It is an interprime number because it is at equal distance from previous prime (1118578871) and next prime (1118578891).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1118578881 - 2¹⁹ = 1118054593 is a prime.

It is a super-2 number, since 2×1118578881² = 2502437426038424322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1118578881.

It is not an unprimeable number, because it can be changed into a prime (1118578871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26632810 + ... + 26632851.

It is an arithmetic number, because the mean of its divisors is an integer number (213062648).

Almost surely, 2^1118578881 is an apocalyptic number.

It is an amenable number.

1118578881 is a deficient number, since it is larger than the sum of its proper divisors (585922303).

1118578881 is an equidigital number, since it uses as much as digits as its factorization.

1118578881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53265671.

The product of its digits is 143360, while the sum is 48.

The square root of 1118578881 is about 33445.1622959136. The cubic root of 1118578881 is about 1038.0593992241.

The spelling of 1118578881 in words is "one billion, one hundred eighteen million, five hundred seventy-eight thousand, eight hundred eighty-one".