1981067441 has 8 divisors (see below), whose sum is σ = 2071121280. Its totient is φ = 1894922436.

The previous prime is 1981067423. The next prime is 1981067453. The reversal of 1981067441 is 1447601891.

It is not a de Polignac number, because 1981067441 - 2⁶ = 1981067377 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 (1981067411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69245 + ... + 93578.

It is an arithmetic number, because the mean of its divisors is an integer number (258890160).

Almost surely, 2^1981067441 is an apocalyptic number.

It is an amenable number.

1981067441 is a deficient number, since it is larger than the sum of its proper divisors (90053839).

1981067441 is an frugal number, since it uses more digits than its factorization.

1981067441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162892 (or 162846 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1981067441 is about 44509.1837826757. The cubic root of 1981067441 is about 1255.9328505573.

The spelling of 1981067441 in words is "one billion, nine hundred eighty-one million, sixty-seven thousand, four hundred forty-one".