2623216613 has 4 divisors (see below), whose sum is σ = 2687197548. Its totient is φ = 2559235680.

The previous prime is 2623216597. The next prime is 2623216619. The reversal of 2623216613 is 3166123262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1391066209 + 1232150404 = 37297^2 + 35102^2 .

It is a cyclic number.

It is not a de Polignac number, because 2623216613 - 2⁴ = 2623216597 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 2623216613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2623216619) 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, 31990406 + ... + 31990487.

It is an arithmetic number, because the mean of its divisors is an integer number (671799387).

Almost surely, 2^2623216613 is an apocalyptic number.

It is an amenable number.

2623216613 is a deficient number, since it is larger than the sum of its proper divisors (63980935).

2623216613 is an equidigital number, since it uses as much as digits as its factorization.

2623216613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63980934.

The product of its digits is 15552, while the sum is 32.

The square root of 2623216613 is about 51217.3467977403. The cubic root of 2623216613 is about 1379.1496218937.

Adding to 2623216613 its reverse (3166123262), we get a palindrome (5789339875).

The spelling of 2623216613 in words is "two billion, six hundred twenty-three million, two hundred sixteen thousand, six hundred thirteen".