1604216625 has 32 divisors (see below), whose sum is σ = 2912098176. Its totient is φ = 777800000.

The previous prime is 1604216587. The next prime is 1604216639. The reversal of 1604216625 is 5266124061.

It is not a de Polignac number, because 1604216625 - 2¹⁰ = 1604215601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190326 + ... + 198575.

It is an arithmetic number, because the mean of its divisors is an integer number (91003068).

Almost surely, 2^1604216625 is an apocalyptic number.

1604216625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1604216625 is a deficient number, since it is larger than the sum of its proper divisors (1307881551).

1604216625 is a wasteful number, since it uses less digits than its factorization.

1604216625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388930 (or 388920 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1604216625 is about 40052.6731317649. The cubic root of 1604216625 is about 1170.6336512119.

The spelling of 1604216625 in words is "one billion, six hundred four million, two hundred sixteen thousand, six hundred twenty-five".