1644105364 has 48 divisors (see below), whose sum is σ = 3186892800. Its totient is φ = 735942240.

The previous prime is 1644105349. The next prime is 1644105373. The reversal of 1644105364 is 4635014461.

It is a super-3 number, since 3×1644105364³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 900957 + ... + 902779.

It is an arithmetic number, because the mean of its divisors is an integer number (66393600).

Almost surely, 2^1644105364 is an apocalyptic number.

It is an amenable number.

1644105364 is a deficient number, since it is larger than the sum of its proper divisors (1542787436).

1644105364 is a wasteful number, since it uses less digits than its factorization.

1644105364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 1644105364 is about 40547.5691503202. The cubic root of 1644105364 is about 1180.2569018357.

The spelling of 1644105364 in words is "one billion, six hundred forty-four million, one hundred five thousand, three hundred sixty-four".