1604299825 has 6 divisors (see below), whose sum is σ = 1989331814. Its totient is φ = 1283439840.

The previous prime is 1604299813. The next prime is 1604299859. The reversal of 1604299825 is 5289924061.

It can be written as a sum of positive squares in 3 ways, for example, as 8856576 + 1595443249 = 2976^2 + 39943^2 .

It is not a de Polignac number, because 1604299825 - 2⁵ = 1604299793 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 32085972 + ... + 32086021.

Almost surely, 2^1604299825 is an apocalyptic number.

It is an amenable number.

1604299825 is a deficient number, since it is larger than the sum of its proper divisors (385031989).

1604299825 is an equidigital number, since it uses as much as digits as its factorization.

1604299825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64172003 (or 64171998 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 1604299825 is about 40053.7117505981. The cubic root of 1604299825 is about 1170.6538885112.

The spelling of 1604299825 in words is "one billion, six hundred four million, two hundred ninety-nine thousand, eight hundred twenty-five".