1686461660228 has 36 divisors (see below), whose sum is σ = 3116010668652. Its totient is φ = 798543679680.

The previous prime is 1686461660203. The next prime is 1686461660263. The reversal of 1686461660228 is 8220661646861.

It can be written as a sum of positive squares in 2 ways, for example, as 684925070404 + 1001536589824 = 827602^2 + 1000768^2 .

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, 3561926 + ... + 4007522.

It is an arithmetic number, because the mean of its divisors is an integer number (86555851907).

Almost surely, 2^{1686461660228} is an apocalyptic number.

It is an amenable number.

1686461660228 is a deficient number, since it is larger than the sum of its proper divisors (1429549008424).

1686461660228 is a wasteful number, since it uses less digits than its factorization.

1686461660228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448260 (or 448239 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 1686461660228 in words is "one trillion, six hundred eighty-six billion, four hundred sixty-one million, six hundred sixty thousand, two hundred twenty-eight".