3944042404493 has 4 divisors (see below), whose sum is σ = 3944153174940. Its totient is φ = 3943931634048.

The previous prime is 3944042404459. The next prime is 3944042404513.

It is a happy number.

3944042404493 is nontrivially palindromic in base 10.

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 2148179754889 + 1795862649604 = 1465667^2 + 1340098^2 .

It is a cyclic number.

It is not a de Polignac number, because 3944042404493 - 2²⁶ = 3943975295629 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 (3944042404193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55331798 + ... + 55403031.

It is an arithmetic number, because the mean of its divisors is an integer number (986038293735).

Almost surely, 2^{3944042404493} is an apocalyptic number.

It is an amenable number.

3944042404493 is a deficient number, since it is larger than the sum of its proper divisors (110770447).

3944042404493 is a wasteful number, since it uses less digits than its factorization.

3944042404493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110770446.

The product of its (nonzero) digits is 5971968, while the sum is 50.

The spelling of 3944042404493 in words is "three trillion, nine hundred forty-four billion, forty-two million, four hundred four thousand, four hundred ninety-three".