16646464416 has 48 divisors (see below), whose sum is σ = 43713014688. Its totient is φ = 5546784000.

The previous prime is 16646464409. The next prime is 16646464427. The reversal of 16646464416 is 61446464661.

16646464416 is a nontrivial binomial coefficient, being equal to C(182464, 2).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243286 + ... + 304106.

It is an arithmetic number, because the mean of its divisors is an integer number (910687806).

Almost surely, 2^16646464416 is an apocalyptic number.

16646464416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16646464416 is the 182463-rd triangular number and also the 91232-nd hexagonal number.

It is an amenable number.

16646464416 is an abundant number, since it is smaller than the sum of its proper divisors (27066550272).

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

16646464416 is a wasteful number, since it uses less digits than its factorization.

16646464416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63685 (or 63677 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 48.

The spelling of 16646464416 in words is "sixteen billion, six hundred forty-six million, four hundred sixty-four thousand, four hundred sixteen".