1604230345905 has 32 divisors (see below), whose sum is σ = 2800181311488. Its totient is φ = 777789163200.

The previous prime is 1604230345903. The next prime is 1604230345951. The reversal of 1604230345905 is 5095430324061.

It is not a de Polignac number, because 1604230345905 - 2¹ = 1604230345903 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1604230345903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8201352 + ... + 8394678.

It is an arithmetic number, because the mean of its divisors is an integer number (87505665984).

Almost surely, 2^{1604230345905} is an apocalyptic number.

1604230345905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1604230345905 is a deficient number, since it is larger than the sum of its proper divisors (1195950965583).

1604230345905 is a wasteful number, since it uses less digits than its factorization.

1604230345905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243637.

The product of its (nonzero) digits is 388800, while the sum is 42.

Adding to 1604230345905 its reverse (5095430324061), we get a palindrome (6699660669966).

The spelling of 1604230345905 in words is "one trillion, six hundred four billion, two hundred thirty million, three hundred forty-five thousand, nine hundred five".