1605065606111 has 4 divisors (see below), whose sum is σ = 1750980661224. Its totient is φ = 1459150551000.

The previous prime is 1605065606099. The next prime is 1605065606219. The reversal of 1605065606111 is 1116065605061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605065606111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605065666111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72957527540 + ... + 72957527561.

It is an arithmetic number, because the mean of its divisors is an integer number (437745165306).

Almost surely, 2^{1605065606111} is an apocalyptic number.

1605065606111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1605065606111 is a deficient number, since it is larger than the sum of its proper divisors (145915055113).

1605065606111 is a wasteful number, since it uses less digits than its factorization.

1605065606111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145915055112.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 1605065606111 in words is "one trillion, six hundred five billion, sixty-five million, six hundred six thousand, one hundred eleven".