2644644516 has 24 divisors (see below), whose sum is σ = 6184235904. Its totient is φ = 879634080.

The previous prime is 2644644467. The next prime is 2644644539. The reversal of 2644644516 is 6154464462.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 233500 + ... + 244563.

It is an arithmetic number, because the mean of its divisors is an integer number (257676496).

Almost surely, 2^2644644516 is an apocalyptic number.

It is an amenable number.

2644644516 is an abundant number, since it is smaller than the sum of its proper divisors (3539591388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2644644516 is a wasteful number, since it uses less digits than its factorization.

2644644516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478531 (or 478529 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The square root of 2644644516 is about 51426.1073385882. The cubic root of 2644644516 is about 1382.8946653928.

The spelling of 2644644516 in words is "two billion, six hundred forty-four million, six hundred forty-four thousand, five hundred sixteen".