440166238861 has 8 divisors (see below), whose sum is σ = 460764661248. Its totient is φ = 419967786000.

The previous prime is 440166238823. The next prime is 440166238877. The reversal of 440166238861 is 168832661044.

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 440166238861 - 2⁹ = 440166238349 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 (440166298861) 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, 99990130 + ... + 99994531.

It is an arithmetic number, because the mean of its divisors is an integer number (57595582656).

Almost surely, 2^440166238861 is an apocalyptic number.

It is an amenable number.

440166238861 is a deficient number, since it is larger than the sum of its proper divisors (20598422387).

440166238861 is a wasteful number, since it uses less digits than its factorization.

440166238861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199984763.

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 440166238861 in words is "four hundred forty billion, one hundred sixty-six million, two hundred thirty-eight thousand, eight hundred sixty-one".