4444918132161 has 16 divisors (see below), whose sum is σ = 6382792154816. Its totient is φ = 2735186118336.

The previous prime is 4444918132141. The next prime is 4444918132183. The reversal of 4444918132161 is 1612318194444.

It is a happy number.

It is not a de Polignac number, because 4444918132161 - 2¹¹ = 4444918130113 is a prime.

It is a super-2 number, since 2×4444918132161² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4444918132161.

It is not an unprimeable number, because it can be changed into a prime (4444918132111) 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, 2354110 + ... + 3798903.

It is an arithmetic number, because the mean of its divisors is an integer number (398924509676).

Almost surely, 2^{4444918132161} is an apocalyptic number.

It is an amenable number.

4444918132161 is a deficient number, since it is larger than the sum of its proper divisors (1937874022655).

4444918132161 is a wasteful number, since it uses less digits than its factorization.

4444918132161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6171552.

The product of its digits is 663552, while the sum is 48.

The spelling of 4444918132161 in words is "four trillion, four hundred forty-four billion, nine hundred eighteen million, one hundred thirty-two thousand, one hundred sixty-one".