16640916480 has 704 divisors, whose sum is σ = 64129726080. Its totient is φ = 4076863488.

The previous prime is 16640916469. The next prime is 16640916493. The reversal of 16640916480 is 8461904661.

16640916480 is a `hidden beast` number, since 1 + 6 + 6 + 409 + 164 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 171555792 + ... + 171555888.

Almost surely, 2^16640916480 is an apocalyptic number.

16640916480 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 16640916480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32064863040).

16640916480 is an abundant number, since it is smaller than the sum of its proper divisors (47488809600).

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

16640916480 is a wasteful number, since it uses less digits than its factorization.

16640916480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 16640916480 in words is "sixteen billion, six hundred forty million, nine hundred sixteen thousand, four hundred eighty".