1644401316 has 24 divisors (see below), whose sum is σ = 3841437600. Its totient is φ = 547490752.

The previous prime is 1644401299. The next prime is 1644401329. The reversal of 1644401316 is 6131044461.

It is a super-3 number, since 3×1644401316³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69666 + ... + 90233.

It is an arithmetic number, because the mean of its divisors is an integer number (160059900).

Almost surely, 2^1644401316 is an apocalyptic number.

It is an amenable number.

1644401316 is an abundant number, since it is smaller than the sum of its proper divisors (2197036284).

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

1644401316 is a wasteful number, since it uses less digits than its factorization.

1644401316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160763 (or 160761 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1644401316 is about 40551.2184280571. The cubic root of 1644401316 is about 1180.3277161200.

Adding to 1644401316 its reverse (6131044461), we get a palindrome (7775445777).

The spelling of 1644401316 in words is "one billion, six hundred forty-four million, four hundred one thousand, three hundred sixteen".