385844643021 has 4 divisors (see below), whose sum is σ = 514459524032. Its totient is φ = 257229762012.

The previous prime is 385844642971. The next prime is 385844643047. The reversal of 385844643021 is 120346448583.

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 not a de Polignac number, because 385844643021 - 2⁶ = 385844642957 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 (385844643071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64307440501 + ... + 64307440506.

It is an arithmetic number, because the mean of its divisors is an integer number (128614881008).

Almost surely, 2^385844643021 is an apocalyptic number.

It is an amenable number.

385844643021 is a deficient number, since it is larger than the sum of its proper divisors (128614881011).

385844643021 is a wasteful number, since it uses less digits than its factorization.

385844643021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128614881010.

The product of its (nonzero) digits is 2211840, while the sum is 48.

The spelling of 385844643021 in words is "three hundred eighty-five billion, eight hundred forty-four million, six hundred forty-three thousand, twenty-one".