6344669899791 has 12 divisors (see below), whose sum is σ = 9460152969280. Its totient is φ = 4093335419040.

The previous prime is 6344669899787. The next prime is 6344669899793. The reversal of 6344669899791 is 1979989664436.

6344669899791 is a `hidden beast` number, since 6 + 3 + 4 + 466 + 9 + 89 + 9 + 79 + 1 = 666.

It is not a de Polignac number, because 6344669899791 - 2² = 6344669899787 is a prime.

It is a super-2 number, since 2×6344669899791² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6344669899791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6344669899793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11370375886 + ... + 11370376443.

Almost surely, 2^{6344669899791} is an apocalyptic number.

6344669899791 is a deficient number, since it is larger than the sum of its proper divisors (3115483069489).

6344669899791 is a wasteful number, since it uses less digits than its factorization.

6344669899791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22740752366 (or 22740752363 counting only the distinct ones).

The product of its digits is 3809369088, while the sum is 81.

The spelling of 6344669899791 in words is "six trillion, three hundred forty-four billion, six hundred sixty-nine million, eight hundred ninety-nine thousand, seven hundred ninety-one".