1686690127712 has 48 divisors (see below), whose sum is σ = 3516348840480. Its totient is φ = 793658861568.

The previous prime is 1686690127663. The next prime is 1686690127739. The reversal of 1686690127712 is 2177210966861.

It is a happy number.

It is a super-2 number, since 2×1686690127712² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5614013 + ... + 5906819.

It is an arithmetic number, because the mean of its divisors is an integer number (73257267510).

Almost surely, 2^{1686690127712} is an apocalyptic number.

It is an amenable number.

1686690127712 is an abundant number, since it is smaller than the sum of its proper divisors (1829658712768).

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

1686690127712 is a wasteful number, since it uses less digits than its factorization.

1686690127712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303423 (or 303415 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 1686690127712 in words is "one trillion, six hundred eighty-six billion, six hundred ninety million, one hundred twenty-seven thousand, seven hundred twelve".