1685929920729 has 8 divisors (see below), whose sum is σ = 2302733550432. Its totient is φ = 1096539785760.

The previous prime is 1685929920679. The next prime is 1685929920797. The reversal of 1685929920729 is 9270299295861.

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

It is not a de Polignac number, because 1685929920729 - 2⁷ = 1685929920601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1685929520729) 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, 6853373539 + ... + 6853373784.

It is an arithmetic number, because the mean of its divisors is an integer number (287841693804).

Almost surely, 2^{1685929920729} is an apocalyptic number.

It is an amenable number.

1685929920729 is a deficient number, since it is larger than the sum of its proper divisors (616803629703).

1685929920729 is a wasteful number, since it uses less digits than its factorization.

1685929920729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13706747367.

The product of its (nonzero) digits is 88179840, while the sum is 69.

The spelling of 1685929920729 in words is "one trillion, six hundred eighty-five billion, nine hundred twenty-nine million, nine hundred twenty thousand, seven hundred twenty-nine".