11485997009 has 4 divisors (see below), whose sum is σ = 11489908080. Its totient is φ = 11482085940.

The previous prime is 11485996939. The next prime is 11485997041. The reversal of 11485997009 is 90079958411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11485997009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11485993009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951127 + ... + 1957004.

It is an arithmetic number, because the mean of its divisors is an integer number (2872477020).

Almost surely, 2^11485997009 is an apocalyptic number.

It is an amenable number.

11485997009 is a deficient number, since it is larger than the sum of its proper divisors (3911071).

11485997009 is an equidigital number, since it uses as much as digits as its factorization.

11485997009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911070.

The product of its (nonzero) digits is 816480, while the sum is 53.

The spelling of 11485997009 in words is "eleven billion, four hundred eighty-five million, nine hundred ninety-seven thousand, nine".