16646543080 has 32 divisors (see below), whose sum is σ = 37905991200. Its totient is φ = 6578391616.

The previous prime is 16646543071. The next prime is 16646543119. The reversal of 16646543080 is 8034564661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2503690 + ... + 2510329.

It is an arithmetic number, because the mean of its divisors is an integer number (1184562225).

Almost surely, 2^16646543080 is an apocalyptic number.

16646543080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16646543080 is an abundant number, since it is smaller than the sum of its proper divisors (21259448120).

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

16646543080 is a wasteful number, since it uses less digits than its factorization.

16646543080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014113 (or 5014109 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 16646543080 in words is "sixteen billion, six hundred forty-six million, five hundred forty-three thousand, eighty".