16528447668 has 12 divisors (see below), whose sum is σ = 38566377920. Its totient is φ = 5509482552.

The previous prime is 16528447651. The next prime is 16528447669. The reversal of 16528447668 is 86674482561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16528447669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688685308 + ... + 688685331.

Almost surely, 2^16528447668 is an apocalyptic number.

It is an amenable number.

16528447668 is an abundant number, since it is smaller than the sum of its proper divisors (22037930252).

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

16528447668 is a wasteful number, since it uses less digits than its factorization.

16528447668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377370646 (or 1377370644 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 57.

The spelling of 16528447668 in words is "sixteen billion, five hundred twenty-eight million, four hundred forty-seven thousand, six hundred sixty-eight".