111604215605 has 16 divisors (see below), whose sum is σ = 136149928704. Its totient is φ = 87800758080.

The previous prime is 111604215581. The next prime is 111604215643. The reversal of 111604215605 is 506512406111.

It is not a de Polignac number, because 111604215605 - 2²⁰ = 111603167029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470602 + ... + 1544628.

It is an arithmetic number, because the mean of its divisors is an integer number (8509370544).

Almost surely, 2^111604215605 is an apocalyptic number.

It is an amenable number.

111604215605 is a deficient number, since it is larger than the sum of its proper divisors (24545713099).

111604215605 is an equidigital number, since it uses as much as digits as its factorization.

111604215605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79036.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 111604215605 in words is "one hundred eleven billion, six hundred four million, two hundred fifteen thousand, six hundred five".