4005039555021 has 8 divisors (see below), whose sum is σ = 5440808452320. Its totient is φ = 2619648513872.

The previous prime is 4005039555019. The next prime is 4005039555029. The reversal of 4005039555021 is 1205559305004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4005039555021 - 2¹ = 4005039555019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005039555029) 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, 12594463851 + ... + 12594464168.

It is an arithmetic number, because the mean of its divisors is an integer number (680101056540).

Almost surely, 2^{4005039555021} is an apocalyptic number.

It is an amenable number.

4005039555021 is a deficient number, since it is larger than the sum of its proper divisors (1435768897299).

4005039555021 is a wasteful number, since it uses less digits than its factorization.

4005039555021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25188928075.

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 4005039555021 in words is "four trillion, five billion, thirty-nine million, five hundred fifty-five thousand, twenty-one".