1686634249628 has 12 divisors (see below), whose sum is σ = 2954325316992. Its totient is φ = 842541301920.

The previous prime is 1686634249627. The next prime is 1686634249633. The reversal of 1686634249628 is 8269424366861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686634249627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193950833 + ... + 193959528.

It is an arithmetic number, because the mean of its divisors is an integer number (246193776416).

Almost surely, 2^{1686634249628} is an apocalyptic number.

It is an amenable number.

1686634249628 is a deficient number, since it is larger than the sum of its proper divisors (1267691067364).

1686634249628 is a wasteful number, since it uses less digits than its factorization.

1686634249628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387911452 (or 387911450 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 65.

The spelling of 1686634249628 in words is "one trillion, six hundred eighty-six billion, six hundred thirty-four million, two hundred forty-nine thousand, six hundred twenty-eight".