40166558381728 has 24 divisors (see below), whose sum is σ = 83239907173920. Its totient is φ = 19026264496320.

The previous prime is 40166558381693. The next prime is 40166558381783. The reversal of 40166558381728 is 82718385566104.

It is a super-2 number, since 2×40166558381728² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40166558381728.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33031708588 + ... + 33031709803.

It is an arithmetic number, because the mean of its divisors is an integer number (3468329465580).

Almost surely, 2^{40166558381728} is an apocalyptic number.

It is an amenable number.

40166558381728 is an abundant number, since it is smaller than the sum of its proper divisors (43073348792192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40166558381728 is a wasteful number, since it uses less digits than its factorization.

40166558381728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66063418420 (or 66063418412 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 40166558381728 in words is "forty trillion, one hundred sixty-six billion, five hundred fifty-eight million, three hundred eighty-one thousand, seven hundred twenty-eight".