16868213652 has 12 divisors (see below), whose sum is σ = 39359165216. Its totient is φ = 5622737880.

The previous prime is 16868213641. The next prime is 16868213653. The reversal of 16868213652 is 25631286861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16868213653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702842224 + ... + 702842247.

Almost surely, 2^16868213652 is an apocalyptic number.

16868213652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16868213652 is an abundant number, since it is smaller than the sum of its proper divisors (22490951564).

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

16868213652 is a wasteful number, since it uses less digits than its factorization.

16868213652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405684478 (or 1405684476 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The spelling of 16868213652 in words is "sixteen billion, eight hundred sixty-eight million, two hundred thirteen thousand, six hundred fifty-two".