16681986534 has 8 divisors (see below), whose sum is σ = 33363973080. Its totient is φ = 5560662176.

The previous prime is 16681986533. The next prime is 16681986553. The reversal of 16681986534 is 43568918661.

It is a sphenic number, since it is the product of 3 distinct primes.

16681986534 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681986533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390165539 + ... + 1390165550.

It is an arithmetic number, because the mean of its divisors is an integer number (4170496635).

Almost surely, 2^16681986534 is an apocalyptic number.

16681986534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16681986534 is a wasteful number, since it uses less digits than its factorization.

16681986534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780331094.

The product of its digits is 7464960, while the sum is 57.

The spelling of 16681986534 in words is "sixteen billion, six hundred eighty-one million, nine hundred eighty-six thousand, five hundred thirty-four".