1685738686 has 8 divisors (see below), whose sum is σ = 2528841744. Its totient is φ = 842791440.

The previous prime is 1685738647. The next prime is 1685738731. The reversal of 1685738686 is 6868375861.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1685738686.

It is a congruent number.

It is an unprimeable number.

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, 6495 + ... + 58426.

It is an arithmetic number, because the mean of its divisors is an integer number (316105218).

Almost surely, 2^1685738686 is an apocalyptic number.

1685738686 is a deficient number, since it is larger than the sum of its proper divisors (843103058).

1685738686 is a wasteful number, since it uses less digits than its factorization.

1685738686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77906.

The product of its digits is 11612160, while the sum is 58.

The square root of 1685738686 is about 41057.7481847215. The cubic root of 1685738686 is about 1190.1364356432.

The spelling of 1685738686 in words is "one billion, six hundred eighty-five million, seven hundred thirty-eight thousand, six hundred eighty-six".