1605423204007 has 8 divisors (see below), whose sum is σ = 1877438431616. Its totient is φ = 1344075240312.

The previous prime is 1605423204001. The next prime is 1605423204023. The reversal of 1605423204007 is 7004023245061.

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

It is a de Polignac number, because none of the positive numbers 2^k-1605423204007 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 (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, 2666815653 + ... + 2666816254.

It is an arithmetic number, because the mean of its divisors is an integer number (234679803952).

Almost surely, 2^{1605423204007} is an apocalyptic number.

1605423204007 is a deficient number, since it is larger than the sum of its proper divisors (272015227609).

1605423204007 is an equidigital number, since it uses as much as digits as its factorization.

1605423204007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333631957.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 1605423204007 its reverse (7004023245061), we get a palindrome (8609446449068).

The spelling of 1605423204007 in words is "one trillion, six hundred five billion, four hundred twenty-three million, two hundred four thousand, seven".