16681986532 has 24 divisors (see below), whose sum is σ = 29656531520. Its totient is φ = 8209706400.

The previous prime is 16681986527. The next prime is 16681986533. The reversal of 16681986532 is 23568918661.

It is not an unprimeable number, because it can be changed into a prime (16681986533) 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, 60858 + ... + 192529.

Almost surely, 2^16681986532 is an apocalyptic number.

It is an amenable number.

16681986532 is a deficient number, since it is larger than the sum of its proper divisors (12974544988).

16681986532 is a wasteful number, since it uses less digits than its factorization.

16681986532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253651 (or 253649 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 55.

The spelling of 16681986532 in words is "sixteen billion, six hundred eighty-one million, nine hundred eighty-six thousand, five hundred thirty-two".