2644089745 has 32 divisors (see below), whose sum is σ = 3562206336. Its totient is φ = 1867161600.

The previous prime is 2644089739. The next prime is 2644089757. The reversal of 2644089745 is 5479804462.

It is not a de Polignac number, because 2644089745 - 2¹¹ = 2644087697 is a prime.

It is a super-2 number, since 2×2644089745² = 13982421159228330050, which contains 22 as substring.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 1303422 + ... + 1305448.

It is an arithmetic number, because the mean of its divisors is an integer number (111318948).

Almost surely, 2^2644089745 is an apocalyptic number.

It is an amenable number.

2644089745 is a deficient number, since it is larger than the sum of its proper divisors (918116591).

2644089745 is a wasteful number, since it uses less digits than its factorization.

2644089745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The square root of 2644089745 is about 51420.7131903088. The cubic root of 2644089745 is about 1382.7979613427.

The spelling of 2644089745 in words is "two billion, six hundred forty-four million, eighty-nine thousand, seven hundred forty-five".