981445363544189 has 4 divisors (see below), whose sum is σ = 981445834301280. Its totient is φ = 981444892787100.

The previous prime is 981445363544111. The next prime is 981445363544197.

981445363544189 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 981445363544189 - 2¹² = 981445363540093 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 (981445363544089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232237337 + ... + 236425614.

It is an arithmetic number, because the mean of its divisors is an integer number (245361458575320).

Almost surely, 2^{981445363544189} is an apocalyptic number.

It is an amenable number.

981445363544189 is a deficient number, since it is larger than the sum of its proper divisors (470757091).

981445363544189 is a wasteful number, since it uses less digits than its factorization.

981445363544189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470757090.

The product of its digits is 1791590400, while the sum is 74.

The spelling of 981445363544189 in words is "nine hundred eighty-one trillion, four hundred forty-five billion, three hundred sixty-three million, five hundred forty-four thousand, one hundred eighty-nine".