2644521317 has 4 divisors (see below), whose sum is σ = 2700787776. Its totient is φ = 2588254860.

The previous prime is 2644521311. The next prime is 2644521329. The reversal of 2644521317 is 7131254462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2644521317 - 2¹⁰ = 2644520293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644521311) 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, 28133159 + ... + 28133252.

It is an arithmetic number, because the mean of its divisors is an integer number (675196944).

Almost surely, 2^2644521317 is an apocalyptic number.

It is an amenable number.

2644521317 is a deficient number, since it is larger than the sum of its proper divisors (56266459).

2644521317 is an equidigital number, since it uses as much as digits as its factorization.

2644521317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56266458.

The product of its digits is 40320, while the sum is 35.

The square root of 2644521317 is about 51424.9094991911. The cubic root of 2644521317 is about 1382.8731913176.

Adding to 2644521317 its reverse (7131254462), we get a palindrome (9775775779).

The spelling of 2644521317 in words is "two billion, six hundred forty-four million, five hundred twenty-one thousand, three hundred seventeen".