1644016480 has 96 divisors (see below), whose sum is σ = 3960744480. Its totient is φ = 644751360.

The previous prime is 1644016469. The next prime is 1644016511. The reversal of 1644016480 is 846104461.

It is a super-3 number, since 3×1644016480³ (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, 1865640 + ... + 1866520.

It is an arithmetic number, because the mean of its divisors is an integer number (41257755).

Almost surely, 2^1644016480 is an apocalyptic number.

1644016480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1644016480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1980372240).

1644016480 is an abundant number, since it is smaller than the sum of its proper divisors (2316728000).

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

1644016480 is a wasteful number, since it uses less digits than its factorization.

1644016480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 1644016480 is about 40546.4730895302. The cubic root of 1644016480 is about 1180.2356323463.

The spelling of 1644016480 in words is "one billion, six hundred forty-four million, sixteen thousand, four hundred eighty".