2611689613 has 8 divisors (see below), whose sum is σ = 2840437656. Its totient is φ = 2386920000.

The previous prime is 2611689557. The next prime is 2611689637. The reversal of 2611689613 is 3169861162.

It can be written as a sum of positive squares in 4 ways, for example, as 473367049 + 2138322564 = 21757^2 + 46242^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2611689613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2611689613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2611689313) 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, 993238 + ... + 995863.

It is an arithmetic number, because the mean of its divisors is an integer number (355054707).

Almost surely, 2^2611689613 is an apocalyptic number.

It is an amenable number.

2611689613 is a deficient number, since it is larger than the sum of its proper divisors (228748043).

2611689613 is a wasteful number, since it uses less digits than its factorization.

2611689613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989215.

The product of its digits is 93312, while the sum is 43.

The square root of 2611689613 is about 51104.6926710258. The cubic root of 2611689613 is about 1377.1265585185.

It can be divided in two parts, 2611 and 689613, that added together give a square (692224 = 832²).

The spelling of 2611689613 in words is "two billion, six hundred eleven million, six hundred eighty-nine thousand, six hundred thirteen".