16604743680 has 432 divisors, whose sum is σ = 66963028860. Its totient is φ = 3794337792.

The previous prime is 16604743637. The next prime is 16604743681. The reversal of 16604743680 is 8634740661.

It is a happy number.

16604743680 is a `hidden beast` number, since 1 + 6 + 604 + 7 + 4 + 36 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16474235904 + 130507776 = 128352^2 + 11424^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (16604743681) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4514002 + ... + 4517678.

Almost surely, 2^16604743680 is an apocalyptic number.

16604743680 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 16604743680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33481514430).

16604743680 is an abundant number, since it is smaller than the sum of its proper divisors (50358285180).

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

16604743680 is a wasteful number, since it uses less digits than its factorization.

16604743680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724 (or 3694 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 16604743680 in words is "sixteen billion, six hundred four million, seven hundred forty-three thousand, six hundred eighty".