3281447811981 has 16 divisors (see below), whose sum is σ = 4431413407680. Its totient is φ = 2159597946240.

The previous prime is 3281447811979. The next prime is 3281447812081. The reversal of 3281447811981 is 1891187441823.

It is not a de Polignac number, because 3281447811981 - 2¹ = 3281447811979 is a prime.

It is a super-2 number, since 2×3281447811981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281447811181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4790950 + ... + 5432871.

It is an arithmetic number, because the mean of its divisors is an integer number (276963337980).

Almost surely, 2^{3281447811981} is an apocalyptic number.

It is an amenable number.

3281447811981 is a deficient number, since it is larger than the sum of its proper divisors (1149965595699).

3281447811981 is a wasteful number, since it uses less digits than its factorization.

3281447811981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10225196.

The product of its digits is 3096576, while the sum is 57.

The spelling of 3281447811981 in words is "three trillion, two hundred eighty-one billion, four hundred forty-seven million, eight hundred eleven thousand, nine hundred eighty-one".