1681310686 has 8 divisors (see below), whose sum is σ = 2751235704. Its totient is φ = 764232120.

The previous prime is 1681310681. The next prime is 1681310711. The reversal of 1681310686 is 6860131861.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681310681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38211585 + ... + 38211628.

It is an arithmetic number, because the mean of its divisors is an integer number (343904463).

Almost surely, 2^1681310686 is an apocalyptic number.

1681310686 is a deficient number, since it is larger than the sum of its proper divisors (1069925018).

1681310686 is a wasteful number, since it uses less digits than its factorization.

1681310686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76423226.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1681310686 is about 41003.7886786087. The cubic root of 1681310686 is about 1189.0934615909.

The spelling of 1681310686 in words is "one billion, six hundred eighty-one million, three hundred ten thousand, six hundred eighty-six".