1118509081 has 8 divisors (see below), whose sum is σ = 1178653280. Its totient is φ = 1058492448.

The previous prime is 1118509061. The next prime is 1118509099. The reversal of 1118509081 is 1809058111.

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

It is a cyclic number.

It is not a de Polignac number, because 1118509081 - 2²¹ = 1116411929 is a prime.

It is a super-2 number, since 2×1118509081² = 2502125128558929122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1118509061) 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, 13611 + ... + 49216.

It is an arithmetic number, because the mean of its divisors is an integer number (147331660).

Almost surely, 2^1118509081 is an apocalyptic number.

It is an amenable number.

1118509081 is a deficient number, since it is larger than the sum of its proper divisors (60144199).

1118509081 is an equidigital number, since it uses as much as digits as its factorization.

1118509081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63783.

The product of its (nonzero) digits is 2880, while the sum is 34.

The square root of 1118509081 is about 33444.1187804373. The cubic root of 1118509081 is about 1038.0378069298.

The spelling of 1118509081 in words is "one billion, one hundred eighteen million, five hundred nine thousand, eighty-one".