111605000001 has 32 divisors (see below), whose sum is σ = 167491307520. Its totient is φ = 65523057600.

The previous prime is 111604999999. The next prime is 111605000053. The reversal of 111605000001 is 100000506111.

It is not a de Polignac number, because 111605000001 - 2¹ = 111604999999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111605000081) 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 31 ways as a sum of consecutive naturals, for example, 265695 + ... + 542036.

It is an arithmetic number, because the mean of its divisors is an integer number (5234103360).

Almost surely, 2^111605000001 is an apocalyptic number.

111605000001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111605000001 is a deficient number, since it is larger than the sum of its proper divisors (55886307519).

111605000001 is a wasteful number, since it uses less digits than its factorization.

111605000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807877.

The product of its (nonzero) digits is 30, while the sum is 15.

Adding to 111605000001 its reverse (100000506111), we get a palindrome (211605506112).

The spelling of 111605000001 in words is "one hundred eleven billion, six hundred five million, one", and thus it is an aban number.