16609812480 has 448 divisors, whose sum is σ = 61715416320. Its totient is φ = 4230217728.

The previous prime is 16609812473. The next prime is 16609812497. The reversal of 16609812480 is 8421890661.

16609812480 is a `hidden beast` number, since 16 + 60 + 98 + 12 + 480 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25435834 + ... + 25436486.

Almost surely, 2^16609812480 is an apocalyptic number.

16609812480 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 16609812480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30857708160).

16609812480 is an abundant number, since it is smaller than the sum of its proper divisors (45105603840).

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

16609812480 is an equidigital number, since it uses as much as digits as its factorization.

16609812480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 16609812480 in words is "sixteen billion, six hundred nine million, eight hundred twelve thousand, four hundred eighty".