4491684881109 has 6 divisors (see below), whose sum is σ = 6487989272726. Its totient is φ = 2994456587400.

The previous prime is 4491684881083. The next prime is 4491684881129. The reversal of 4491684881109 is 9011884861944.

4491684881109 is a `hidden beast` number, since 4 + 4 + 91 + 68 + 488 + 1 + 1 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3640761654084 + 850923227025 = 1908078^2 + 922455^2 .

It is not a de Polignac number, because 4491684881109 - 2⁹ = 4491684880597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491684881129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249538048942 + ... + 249538048959.

Almost surely, 2^{4491684881109} is an apocalyptic number.

It is an amenable number.

4491684881109 is a deficient number, since it is larger than the sum of its proper divisors (1996304391617).

4491684881109 is a wasteful number, since it uses less digits than its factorization.

4491684881109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499076097907 (or 499076097904 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 63.

The spelling of 4491684881109 in words is "four trillion, four hundred ninety-one billion, six hundred eighty-four million, eight hundred eighty-one thousand, one hundred nine".