2644521316 has 12 divisors (see below), whose sum is σ = 4630163580. Its totient is φ = 1321617440.

The previous prime is 2644521311. The next prime is 2644521329. The reversal of 2644521316 is 6131254462.

It can be written as a sum of positive squares in 2 ways, for example, as 659462400 + 1985058916 = 25680^2 + 44554^2 .

It is not an unprimeable number, because it can be changed into a prime (2644521311) 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, 151495 + ... + 168046.

It is an arithmetic number, because the mean of its divisors is an integer number (385846965).

Almost surely, 2^2644521316 is an apocalyptic number.

It is an amenable number.

2644521316 is a deficient number, since it is larger than the sum of its proper divisors (1985642264).

2644521316 is a wasteful number, since it uses less digits than its factorization.

2644521316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321614 (or 321612 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 2644521316 is about 51424.9094894682. The cubic root of 2644521316 is about 1382.8731911433.

Adding to 2644521316 its reverse (6131254462), we get a palindrome (8775775778).

The spelling of 2644521316 in words is "two billion, six hundred forty-four million, five hundred twenty-one thousand, three hundred sixteen".