16681885400 has 48 divisors (see below), whose sum is σ = 39185278440. Its totient is φ = 6603955200.

The previous prime is 16681885399. The next prime is 16681885417. The reversal of 16681885400 is 458818661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 410546 + ... + 449345.

Almost surely, 2^16681885400 is an apocalyptic number.

16681885400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16681885400 is an abundant number, since it is smaller than the sum of its proper divisors (22503393040).

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

16681885400 is a wasteful number, since it uses less digits than its factorization.

16681885400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860004 (or 859995 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 16681885400 in words is "sixteen billion, six hundred eighty-one million, eight hundred eighty-five thousand, four hundred".