1686425533986 has 16 divisors (see below), whose sum is σ = 3423192129504. Its totient is φ = 553751667744.

The previous prime is 1686425533979. The next prime is 1686425534039. The reversal of 1686425533986 is 6893355246861.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2097543795 + ... + 2097544598.

It is an arithmetic number, because the mean of its divisors is an integer number (213949508094).

Almost surely, 2^{1686425533986} is an apocalyptic number.

1686425533986 is an abundant number, since it is smaller than the sum of its proper divisors (1736766595518).

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

1686425533986 is a wasteful number, since it uses less digits than its factorization.

1686425533986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195088465.

The product of its digits is 223948800, while the sum is 66.

The spelling of 1686425533986 in words is "one trillion, six hundred eighty-six billion, four hundred twenty-five million, five hundred thirty-three thousand, nine hundred eighty-six".