1686225885 has 8 divisors (see below), whose sum is σ = 2697961440. Its totient is φ = 899320464.

The previous prime is 1686225881. The next prime is 1686225911. The reversal of 1686225885 is 5885226861.

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

It is not a de Polignac number, because 1686225885 - 2² = 1686225881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686225881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56207515 + ... + 56207544.

It is an arithmetic number, because the mean of its divisors is an integer number (337245180).

Almost surely, 2^1686225885 is an apocalyptic number.

1686225885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1686225885 is a deficient number, since it is larger than the sum of its proper divisors (1011735555).

1686225885 is a wasteful number, since it uses less digits than its factorization.

1686225885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112415067.

The product of its digits is 1843200, while the sum is 51.

The square root of 1686225885 is about 41063.6808506008. The cubic root of 1686225885 is about 1190.2510792384.

The spelling of 1686225885 in words is "one billion, six hundred eighty-six million, two hundred twenty-five thousand, eight hundred eighty-five".