16640906880 has 384 divisors, whose sum is σ = 58829258880. Its totient is φ = 3977330688.

The previous prime is 16640906879. The next prime is 16640906899. The reversal of 16640906880 is 8860904661.

It is a tau number, because it is divible by the number of its divisors (384).

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

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, 34169997 + ... + 34170483.

It is an arithmetic number, because the mean of its divisors is an integer number (153201195).

Almost surely, 2^16640906880 is an apocalyptic number.

16640906880 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 16640906880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29414629440).

16640906880 is an abundant number, since it is smaller than the sum of its proper divisors (42188352000).

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

16640906880 is a wasteful number, since it uses less digits than its factorization.

16640906880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 16640906880 in words is "sixteen billion, six hundred forty million, nine hundred six thousand, eight hundred eighty".