16684120864 has 12 divisors (see below), whose sum is σ = 32846863014. Its totient is φ = 8342060416.

The previous prime is 16684120847. The next prime is 16684120879. The reversal of 16684120864 is 46802148661.

It can be written as a sum of positive squares in only one way, i.e., 11599290000 + 5084830864 = 107700^2 + 71308^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260689357 + ... + 260689420.

Almost surely, 2^16684120864 is an apocalyptic number.

It is an amenable number.

16684120864 is a deficient number, since it is larger than the sum of its proper divisors (16162742150).

16684120864 is an equidigital number, since it uses as much as digits as its factorization.

16684120864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521378787 (or 521378779 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 16684120864 in words is "sixteen billion, six hundred eighty-four million, one hundred twenty thousand, eight hundred sixty-four".