16645412064 has 48 divisors (see below), whose sum is σ = 45593960832. Its totient is φ = 5307232128.

The previous prime is 16645412059. The next prime is 16645412071. The reversal of 16645412064 is 46021454661.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent 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, 3767134 + ... + 3771549.

It is an arithmetic number, because the mean of its divisors is an integer number (949874184).

Almost surely, 2^16645412064 is an apocalyptic number.

It is an amenable number.

16645412064 is an abundant number, since it is smaller than the sum of its proper divisors (28948548768).

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

16645412064 is a wasteful number, since it uses less digits than its factorization.

16645412064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7538719 (or 7538711 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 16645412064 in words is "sixteen billion, six hundred forty-five million, four hundred twelve thousand, sixty-four".