1644422460123 has 16 divisors (see below), whose sum is σ = 2290133051136. Its totient is φ = 1047590126880.

The previous prime is 1644422460097. The next prime is 1644422460157. The reversal of 1644422460123 is 3210642244461.

It is not a de Polignac number, because 1644422460123 - 2⁵ = 1644422460091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1644422460173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11600565 + ... + 11741462.

It is an arithmetic number, because the mean of its divisors is an integer number (143133315696).

Almost surely, 2^{1644422460123} is an apocalyptic number.

1644422460123 is a deficient number, since it is larger than the sum of its proper divisors (645710591013).

1644422460123 is a wasteful number, since it uses less digits than its factorization.

1644422460123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23343074.

The product of its (nonzero) digits is 221184, while the sum is 39.

The spelling of 1644422460123 in words is "one trillion, six hundred forty-four billion, four hundred twenty-two million, four hundred sixty thousand, one hundred twenty-three".