1653610613 has 4 divisors (see below), whose sum is σ = 1658894028. Its totient is φ = 1648327200.

The previous prime is 1653610597. The next prime is 1653610619. The reversal of 1653610613 is 3160163561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3160163561 = 677 ⋅4667893.

It can be written as a sum of positive squares in 2 ways, for example, as 8334769 + 1645275844 = 2887^2 + 40562^2 .

It is a cyclic number.

It is not a de Polignac number, because 1653610613 - 2⁴ = 1653610597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1653610613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1653610619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2641238 + ... + 2641863.

It is an arithmetic number, because the mean of its divisors is an integer number (414723507).

Almost surely, 2^1653610613 is an apocalyptic number.

It is an amenable number.

1653610613 is a deficient number, since it is larger than the sum of its proper divisors (5283415).

1653610613 is an equidigital number, since it uses as much as digits as its factorization.

1653610613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5283414.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 1653610613 is about 40664.6113100814. The cubic root of 1653610613 is about 1182.5270493390.

The spelling of 1653610613 in words is "one billion, six hundred fifty-three million, six hundred ten thousand, six hundred thirteen".