1653530409 has 8 divisors (see below), whose sum is σ = 2449674720. Its totient is φ = 1102353588.

The previous prime is 1653530341. The next prime is 1653530413. The reversal of 1653530409 is 9040353561.

It is not a de Polignac number, because 1653530409 - 2⁹ = 1653529897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1653530429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30620907 + ... + 30620960.

It is an arithmetic number, because the mean of its divisors is an integer number (306209340).

Almost surely, 2^1653530409 is an apocalyptic number.

It is an amenable number.

1653530409 is a deficient number, since it is larger than the sum of its proper divisors (796144311).

1653530409 is an equidigital number, since it uses as much as digits as its factorization.

1653530409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61241876 (or 61241870 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 1653530409 is about 40663.6251335269. The cubic root of 1653530409 is about 1182.5079305831.

The spelling of 1653530409 in words is "one billion, six hundred fifty-three million, five hundred thirty thousand, four hundred nine".