1118032561 has 8 divisors (see below), whose sum is σ = 1177261920. Its totient is φ = 1058841792.

The previous prime is 1118032549. The next prime is 1118032579. The reversal of 1118032561 is 1652308111.

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 1118032561 - 2¹¹ = 1118030513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1118032501) 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, 64521 + ... + 79993.

It is an arithmetic number, because the mean of its divisors is an integer number (147157740).

Almost surely, 2^1118032561 is an apocalyptic number.

It is an amenable number.

1118032561 is a deficient number, since it is larger than the sum of its proper divisors (59229359).

1118032561 is a wasteful number, since it uses less digits than its factorization.

1118032561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19295.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1118032561 is about 33436.9938989736. The cubic root of 1118032561 is about 1037.8903737542.

The spelling of 1118032561 in words is "one billion, one hundred eighteen million, thirty-two thousand, five hundred sixty-one".