2644045040669 has 16 divisors (see below), whose sum is σ = 2690254667520. Its totient is φ = 2598235881600.

The previous prime is 2644045040653. The next prime is 2644045040677. The reversal of 2644045040669 is 9660405404462.

It is a cyclic number.

It is not a de Polignac number, because 2644045040669 - 2⁴ = 2644045040653 is a prime.

It is a super-2 number, since 2×2644045040669² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644045040369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81331472 + ... + 81363974.

It is an arithmetic number, because the mean of its divisors is an integer number (168140916720).

Almost surely, 2^{2644045040669} is an apocalyptic number.

It is an amenable number.

2644045040669 is a deficient number, since it is larger than the sum of its proper divisors (46209626851).

2644045040669 is a wasteful number, since it uses less digits than its factorization.

2644045040669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38620.

The product of its (nonzero) digits is 4976640, while the sum is 50.

The spelling of 2644045040669 in words is "two trillion, six hundred forty-four billion, forty-five million, forty thousand, six hundred sixty-nine".