2621516017 has 4 divisors (see below), whose sum is σ = 2625937380. Its totient is φ = 2617094656.

The previous prime is 2621516003. The next prime is 2621516021. The reversal of 2621516017 is 7106151262.

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 534488161 + 2087027856 = 23119^2 + 45684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621516017 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 2621516017.

It is not an unprimeable number, because it can be changed into a prime (2621516047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2209792 + ... + 2210977.

It is an arithmetic number, because the mean of its divisors is an integer number (656484345).

Almost surely, 2^2621516017 is an apocalyptic number.

It is an amenable number.

2621516017 is a deficient number, since it is larger than the sum of its proper divisors (4421363).

2621516017 is an equidigital number, since it uses as much as digits as its factorization.

2621516017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421362.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 2621516017 is about 51200.7423481340. The cubic root of 2621516017 is about 1378.8515294263.

Adding to 2621516017 its reverse (7106151262), we get a palindrome (9727667279).

The spelling of 2621516017 in words is "two billion, six hundred twenty-one million, five hundred sixteen thousand, seventeen".