16640345304 has 192 divisors, whose sum is σ = 50094495360. Its totient is φ = 4948024320.

The previous prime is 16640345299. The next prime is 16640345311. The reversal of 16640345304 is 40354304661.

16640345304 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 0 + 345 + 304 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10714192 + ... + 10715744.

It is an arithmetic number, because the mean of its divisors is an integer number (260908830).

Almost surely, 2^16640345304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16640345304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25047247680).

16640345304 is an abundant number, since it is smaller than the sum of its proper divisors (33454150056).

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

16640345304 is a wasteful number, since it uses less digits than its factorization.

16640345304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822 (or 1815 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 16640345304 its reverse (40354304661), we get a palindrome (56994649965).

The spelling of 16640345304 in words is "sixteen billion, six hundred forty million, three hundred forty-five thousand, three hundred four".