1611065613 has 16 divisors (see below), whose sum is σ = 2359457280. Its totient is φ = 973274544.

The previous prime is 1611065591. The next prime is 1611065627. The reversal of 1611065613 is 3165601161.

It is not a de Polignac number, because 1611065613 - 2⁶ = 1611065549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611065633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613131 + ... + 615752.

It is an arithmetic number, because the mean of its divisors is an integer number (147466080).

Almost surely, 2^1611065613 is an apocalyptic number.

It is an amenable number.

1611065613 is a deficient number, since it is larger than the sum of its proper divisors (748391667).

1611065613 is a wasteful number, since it uses less digits than its factorization.

1611065613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228928.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1611065613 is about 40138.0818301024. The cubic root of 1611065613 is about 1172.2972404863.

Adding to 1611065613 its reverse (3165601161), we get a palindrome (4776666774).

The spelling of 1611065613 in words is "one billion, six hundred eleven million, sixty-five thousand, six hundred thirteen".