3481818918991 has 12 divisors (see below), whose sum is σ = 4050309620640. Its totient is φ = 2984393764800.

The previous prime is 3481818918989. The next prime is 3481818919027. The reversal of 3481818918991 is 1998198181843.

It is not a de Polignac number, because 3481818918991 - 2¹ = 3481818918989 is a prime.

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 3481818918991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3481818918961) 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, 11996791 + ... + 12283591.

It is an arithmetic number, because the mean of its divisors is an integer number (337525801720).

Almost surely, 2^{3481818918991} is an apocalyptic number.

3481818918991 is a deficient number, since it is larger than the sum of its proper divisors (568490701649).

3481818918991 is a wasteful number, since it uses less digits than its factorization.

3481818918991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534574 (or 534567 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 70.

The spelling of 3481818918991 in words is "three trillion, four hundred eighty-one billion, eight hundred eighteen million, nine hundred eighteen thousand, nine hundred ninety-one".