1606543625 has 16 divisors (see below), whose sum is σ = 2033216640. Its totient is φ = 1267126000.

The previous prime is 1606543559. The next prime is 1606543649. The reversal of 1606543625 is 5263456061.

It is a happy number.

It is not a de Polignac number, because 1606543625 - 2⁸ = 1606543369 is a prime.

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, 81635 + ... + 99384.

It is an arithmetic number, because the mean of its divisors is an integer number (127076040).

Almost surely, 2^1606543625 is an apocalyptic number.

It is an amenable number.

1606543625 is a deficient number, since it is larger than the sum of its proper divisors (426673015).

1606543625 is an equidigital number, since it uses as much as digits as its factorization.

1606543625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181105 (or 181095 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 1606543625 is about 40081.7118521652. The cubic root of 1606543625 is about 1171.1993995013.

Adding to 1606543625 its reverse (5263456061), we get a palindrome (6869999686).

The spelling of 1606543625 in words is "one billion, six hundred six million, five hundred forty-three thousand, six hundred twenty-five".