1685036686867 has 4 divisors (see below), whose sum is σ = 1739392709056. Its totient is φ = 1630680664680.

The previous prime is 1685036686859. The next prime is 1685036686871. The reversal of 1685036686867 is 7686866305861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1685036686867 - 2³ = 1685036686859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1685036686796 and 1685036686805.

It is not an unprimeable number, because it can be changed into a prime (1685036683867) 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, 27178011048 + ... + 27178011109.

It is an arithmetic number, because the mean of its divisors is an integer number (434848177264).

Almost surely, 2^{1685036686867} is an apocalyptic number.

1685036686867 is a deficient number, since it is larger than the sum of its proper divisors (54356022189).

1685036686867 is an equidigital number, since it uses as much as digits as its factorization.

1685036686867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54356022188.

The product of its (nonzero) digits is 418037760, while the sum is 70.

The spelling of 1685036686867 in words is "one trillion, six hundred eighty-five billion, thirty-six million, six hundred eighty-six thousand, eight hundred sixty-seven".