440042065161646 has 32 divisors (see below), whose sum is σ = 670387519825920. Its totient is φ = 216584239598496.

The previous prime is 440042065161619. The next prime is 440042065161649. The reversal of 440042065161646 is 646161560240044.

It is a happy number.

It is a super-2 number, since 2×440042065161646² (a number of 30 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 440042065161646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440042065161649) 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, 1276025775 + ... + 1276370581.

It is an arithmetic number, because the mean of its divisors is an integer number (20949609994560).

Almost surely, 2^{440042065161646} is an apocalyptic number.

440042065161646 is a deficient number, since it is larger than the sum of its proper divisors (230345454664274).

440042065161646 is a wasteful number, since it uses less digits than its factorization.

440042065161646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351568.

The product of its (nonzero) digits is 3317760, while the sum is 49.

The spelling of 440042065161646 in words is "four hundred forty trillion, forty-two billion, sixty-five million, one hundred sixty-one thousand, six hundred forty-six".