2644352644 has 12 divisors (see below), whose sum is σ = 4670073100. Its totient is φ = 1310046048.

The previous prime is 2644352629. The next prime is 2644352651. The reversal of 2644352644 is 4462534462.

It can be written as a sum of positive squares in 2 ways, for example, as 1002482244 + 1641870400 = 31662^2 + 40520^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2644352597 and 2644352606.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3032079 + ... + 3032950.

Almost surely, 2^2644352644 is an apocalyptic number.

It is an amenable number.

2644352644 is a deficient number, since it is larger than the sum of its proper divisors (2025720456).

2644352644 is a wasteful number, since it uses less digits than its factorization.

2644352644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6065142 (or 6065140 counting only the distinct ones).

The product of its digits is 552960, while the sum is 40.

The square root of 2644352644 is about 51423.2694798765. The cubic root of 2644352644 is about 1382.8437898619.

The spelling of 2644352644 in words is "two billion, six hundred forty-four million, three hundred fifty-two thousand, six hundred forty-four".