921443344129 has 48 divisors (see below), whose sum is σ = 1163015159040. Its totient is φ = 714602275200.

The previous prime is 921443344043. The next prime is 921443344153.

921443344129 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 921443344129 - 2¹⁵ = 921443311361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (921443344429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 351560439 + ... + 351563059.

It is an arithmetic number, because the mean of its divisors is an integer number (24229482480).

Almost surely, 2^921443344129 is an apocalyptic number.

It is an amenable number.

921443344129 is a deficient number, since it is larger than the sum of its proper divisors (241571814911).

921443344129 is a wasteful number, since it uses less digits than its factorization.

921443344129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462 (or 4451 counting only the distinct ones).

The product of its digits is 746496, while the sum is 46.

The spelling of 921443344129 in words is "nine hundred twenty-one billion, four hundred forty-three million, three hundred forty-four thousand, one hundred twenty-nine".