1644016930881 has 16 divisors (see below), whose sum is σ = 2360756091456. Its totient is φ = 1011652842816.

The previous prime is 1644016930849. The next prime is 1644016930901. The reversal of 1644016930881 is 1880396104461.

It is not a de Polignac number, because 1644016930881 - 2⁵ = 1644016930849 is a prime.

It is a super-3 number, since 3×1644016930881³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1644016910881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230170 + ... + 1827843.

It is an arithmetic number, because the mean of its divisors is an integer number (147547255716).

Almost surely, 2^{1644016930881} is an apocalyptic number.

It is an amenable number.

1644016930881 is a deficient number, since it is larger than the sum of its proper divisors (716739160575).

1644016930881 is a wasteful number, since it uses less digits than its factorization.

1644016930881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078512.

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 1644016930881 in words is "one trillion, six hundred forty-four billion, sixteen million, nine hundred thirty thousand, eight hundred eighty-one".