1644346522134 has 64 divisors (see below), whose sum is σ = 3724430673600. Its totient is φ = 537574093056.

The previous prime is 1644346522111. The next prime is 1644346522171. The reversal of 1644346522134 is 4312256434461.

1644346522134 is a `hidden beast` number, since 1 + 6 + 4 + 434 + 65 + 22 + 134 = 666.

It is a super-3 number, since 3×1644346522134³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1644346522134.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7705132 + ... + 7915664.

It is an arithmetic number, because the mean of its divisors is an integer number (58194229275).

Almost surely, 2^{1644346522134} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1644346522134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862215336800).

1644346522134 is an abundant number, since it is smaller than the sum of its proper divisors (2080084151466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1644346522134 is a wasteful number, since it uses less digits than its factorization.

1644346522134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213326 (or 213320 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The spelling of 1644346522134 in words is "one trillion, six hundred forty-four billion, three hundred forty-six million, five hundred twenty-two thousand, one hundred thirty-four".