1117618985 has 8 divisors (see below), whose sum is σ = 1532734656. Its totient is φ = 766367280.

The previous prime is 1117618979. The next prime is 1117618991. The reversal of 1117618985 is 5898167111.

1117618985 = T₂₁₁₄₁ + T₂₁₁₄₂ + ... + T₂₁₁₄₅.

It is an interprime number because it is at equal distance from previous prime (1117618979) and next prime (1117618991).

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

It is a de Polignac number, because none of the positive numbers 2^k-1117618985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15965951 + ... + 15966020.

It is an arithmetic number, because the mean of its divisors is an integer number (191591832).

Almost surely, 2^1117618985 is an apocalyptic number.

It is an amenable number.

1117618985 is a deficient number, since it is larger than the sum of its proper divisors (415115671).

1117618985 is an equidigital number, since it uses as much as digits as its factorization.

1117618985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31931983.

The product of its digits is 120960, while the sum is 47.

The square root of 1117618985 is about 33430.8089193187. The cubic root of 1117618985 is about 1037.7623812123.

The spelling of 1117618985 in words is "one billion, one hundred seventeen million, six hundred eighteen thousand, nine hundred eighty-five".