1686643196 has 48 divisors (see below), whose sum is σ = 3404104704. Its totient is φ = 716278656.

The previous prime is 1686643169. The next prime is 1686643201. The reversal of 1686643196 is 6913466861.

It is a super-3 number, since 3×1686643196³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1715321 + ... + 1716303.

It is an arithmetic number, because the mean of its divisors is an integer number (70918848).

Almost surely, 2^1686643196 is an apocalyptic number.

It is an amenable number.

1686643196 is an abundant number, since it is smaller than the sum of its proper divisors (1717461508).

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

1686643196 is a wasteful number, since it uses less digits than its factorization.

1686643196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1488 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 50.

The square root of 1686643196 is about 41068.7618026159. The cubic root of 1686643196 is about 1190.3492598169.

The spelling of 1686643196 in words is "one billion, six hundred eighty-six million, six hundred forty-three thousand, one hundred ninety-six".