1686685185352 has 32 divisors (see below), whose sum is σ = 3185846325720. Its totient is φ = 837127045120.

The previous prime is 1686685185313. The next prime is 1686685185371. The reversal of 1686685185352 is 2535815866861.

It can be written as a sum of positive squares in 4 ways, for example, as 1667181945636 + 19503239716 = 1291194^2 + 139654^2 .

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, 18016488 + ... + 18109864.

Almost surely, 2^{1686685185352} is an apocalyptic number.

It is an amenable number.

1686685185352 is a deficient number, since it is larger than the sum of its proper divisors (1499161140368).

1686685185352 is a wasteful number, since it uses less digits than its factorization.

1686685185352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110001 (or 109997 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 64.

The spelling of 1686685185352 in words is "one trillion, six hundred eighty-six billion, six hundred eighty-five million, one hundred eighty-five thousand, three hundred fifty-two".