1686125868 has 36 divisors (see below), whose sum is σ = 4576628952. Its totient is φ = 481750080.

The previous prime is 1686125851. The next prime is 1686125887. The reversal of 1686125868 is 8685216861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1686125868.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1433193 + ... + 1434368.

It is an arithmetic number, because the mean of its divisors is an integer number (127128582).

Almost surely, 2^1686125868 is an apocalyptic number.

It is an amenable number.

1686125868 is an abundant number, since it is smaller than the sum of its proper divisors (2890503084).

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

1686125868 is a wasteful number, since it uses less digits than its factorization.

1686125868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867582 (or 2867573 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 51.

The square root of 1686125868 is about 41062.4630045495. The cubic root of 1686125868 is about 1190.2275458757.

The spelling of 1686125868 in words is "one billion, six hundred eighty-six million, one hundred twenty-five thousand, eight hundred sixty-eight".