40166042544838 has 32 divisors (see below), whose sum is σ = 74979389779200. Its totient is φ = 15745671847584.

The previous prime is 40166042544833. The next prime is 40166042544841. The reversal of 40166042544838 is 83844524066104.

It is a super-2 number, since 2×40166042544838² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40166042544833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2603443320 + ... + 2603458747.

It is an arithmetic number, because the mean of its divisors is an integer number (2343105930600).

Almost surely, 2^{40166042544838} is an apocalyptic number.

40166042544838 is a deficient number, since it is larger than the sum of its proper divisors (34813347234362).

40166042544838 is a wasteful number, since it uses less digits than its factorization.

40166042544838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206902124.

The product of its (nonzero) digits is 17694720, while the sum is 55.

The spelling of 40166042544838 in words is "forty trillion, one hundred sixty-six billion, forty-two million, five hundred forty-four thousand, eight hundred thirty-eight".