1606005625 has 45 divisors (see below), whose sum is σ = 2344754907. Its totient is φ = 1096452000.

The previous prime is 1606005619. The next prime is 1606005677. The reversal of 1606005625 is 5265006061.

The square root of 1606005625 is 40075.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 437186281 + 1168819344 = 20909^2 + 34188^2 .

It is not a de Polignac number, because 1606005625 - 2³ = 1606005617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 7013011 + ... + 7013239.

Almost surely, 2^1606005625 is an apocalyptic number.

1606005625 is the 40075-th square number.

1606005625 is the 20038-th centered octagonal number.

It is an amenable number.

1606005625 is a deficient number, since it is larger than the sum of its proper divisors (738749282).

1606005625 is an frugal number, since it uses more digits than its factorization.

1606005625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The cubic root of 1606005625 is about 1171.0686476568.

The spelling of 1606005625 in words is "one billion, six hundred six million, five thousand, six hundred twenty-five".