1605204432120 has 64 divisors (see below), whose sum is σ = 4817055006720. Its totient is φ = 427926363264.

The previous prime is 1605204432113. The next prime is 1605204432131. The reversal of 1605204432120 is 212344025061.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 1599544 + ... + 2401863.

It is an arithmetic number, because the mean of its divisors is an integer number (75266484480).

Almost surely, 2^{1605204432120} is an apocalyptic number.

1605204432120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1605204432120 is an abundant number, since it is smaller than the sum of its proper divisors (3211850574600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605204432120 is a wasteful number, since it uses less digits than its factorization.

1605204432120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004764 (or 4004760 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1605204432120 its reverse (212344025061), we get a palindrome (1817548457181).

The spelling of 1605204432120 in words is "one trillion, six hundred five billion, two hundred four million, four hundred thirty-two thousand, one hundred twenty".