1605423204011 has 8 divisors (see below), whose sum is σ = 1773540019200. Its totient is φ = 1441001264040.

The previous prime is 1605423204001. The next prime is 1605423204023. The reversal of 1605423204011 is 1104023245061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605423204011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605423204001) 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, 923717891 + ... + 923719628.

It is an arithmetic number, because the mean of its divisors is an integer number (221692502400).

Almost surely, 2^{1605423204011} is an apocalyptic number.

1605423204011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1605423204011 is a deficient number, since it is larger than the sum of its proper divisors (168116815189).

1605423204011 is a wasteful number, since it uses less digits than its factorization.

1605423204011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847437609.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 1605423204011 its reverse (1104023245061), we get a palindrome (2709446449072).

The spelling of 1605423204011 in words is "one trillion, six hundred five billion, four hundred twenty-three million, two hundred four thousand, eleven".