16681888408 has 32 divisors (see below), whose sum is σ = 32650011360. Its totient is φ = 7975475200.

The previous prime is 16681888397. The next prime is 16681888409. The reversal of 16681888408 is 80488818661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681888409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562758 + ... + 591658.

It is an arithmetic number, because the mean of its divisors is an integer number (1020312855).

Almost surely, 2^16681888408 is an apocalyptic number.

It is an amenable number.

16681888408 is a deficient number, since it is larger than the sum of its proper divisors (15968122952).

16681888408 is a wasteful number, since it uses less digits than its factorization.

16681888408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32067 (or 32063 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 58.

The spelling of 16681888408 in words is "sixteen billion, six hundred eighty-one million, eight hundred eighty-eight thousand, four hundred eight".