1118510981 has 8 divisors (see below), whose sum is σ = 1345577280. Its totient is φ = 908264448.

The previous prime is 1118510959. The next prime is 1118510983. The reversal of 1118510981 is 1890158111.

It is a happy number.

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

It is not a de Polignac number, because 1118510981 - 2⁶ = 1118510917 is a prime.

It is a super-2 number, since 2×1118510981² = 2502133629235164722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118510983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4204796 + ... + 4205061.

It is an arithmetic number, because the mean of its divisors is an integer number (168197160).

Almost surely, 2^1118510981 is an apocalyptic number.

It is an amenable number.

1118510981 is a deficient number, since it is larger than the sum of its proper divisors (227066299).

1118510981 is an equidigital number, since it uses as much as digits as its factorization.

1118510981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409883.

The product of its (nonzero) digits is 2880, while the sum is 35.

The square root of 1118510981 is about 33444.1471860175. The cubic root of 1118510981 is about 1038.0383946975.

The spelling of 1118510981 in words is "one billion, one hundred eighteen million, five hundred ten thousand, nine hundred eighty-one".