1644060364 has 12 divisors (see below), whose sum is σ = 2890009024. Its totient is φ = 818343504.

The previous prime is 1644060343. The next prime is 1644060427. The reversal of 1644060364 is 4630604461.

It is a super-3 number, since 3×1644060364³ (a number of 29 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 920667 + ... + 922450.

Almost surely, 2^1644060364 is an apocalyptic number.

It is an amenable number.

1644060364 is a deficient number, since it is larger than the sum of its proper divisors (1245948660).

1644060364 is a wasteful number, since it uses less digits than its factorization.

1644060364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843344 (or 1843342 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 1644060364 is about 40547.0142427282. The cubic root of 1644060364 is about 1180.2461336602.

The spelling of 1644060364 in words is "one billion, six hundred forty-four million, sixty thousand, three hundred sixty-four".