4002040023985 has 4 divisors (see below), whose sum is σ = 4802448028788. Its totient is φ = 3201632019184.

The previous prime is 4002040023983. The next prime is 4002040023991. The reversal of 4002040023985 is 5893200402004.

It is a happy number.

4002040023985 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2453229905841 + 1548810118144 = 1566279^2 + 1244512^2 .

It is a cyclic number.

It is not a de Polignac number, because 4002040023985 - 2¹ = 4002040023983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4002040023983) 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, 400204002394 + ... + 400204002403.

It is an arithmetic number, because the mean of its divisors is an integer number (1200612007197).

Almost surely, 2^{4002040023985} is an apocalyptic number.

It is an amenable number.

4002040023985 is a deficient number, since it is larger than the sum of its proper divisors (800408004803).

4002040023985 is an equidigital number, since it uses as much as digits as its factorization.

4002040023985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800408004802.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 4002040023985 its reverse (5893200402004), we get a palindrome (9895240425989).

The spelling of 4002040023985 in words is "four trillion, two billion, forty million, twenty-three thousand, nine hundred eighty-five".