1685038333705 has 4 divisors (see below), whose sum is σ = 2022046000452. Its totient is φ = 1348030666960.

The previous prime is 1685038333703. The next prime is 1685038333717. The reversal of 1685038333705 is 5073338305861.

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

It can be written as a sum of positive squares in 2 ways, for example, as 882451693321 + 802586640384 = 939389^2 + 895872^2 .

It is not a de Polignac number, because 1685038333705 - 2¹ = 1685038333703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685038333703) 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, 168503833366 + ... + 168503833375.

It is an arithmetic number, because the mean of its divisors is an integer number (505511500113).

Almost surely, 2^{1685038333705} is an apocalyptic number.

It is an amenable number.

1685038333705 is a deficient number, since it is larger than the sum of its proper divisors (337007666747).

1685038333705 is an equidigital number, since it uses as much as digits as its factorization.

1685038333705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337007666746.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 1685038333705 in words is "one trillion, six hundred eighty-five billion, thirty-eight million, three hundred thirty-three thousand, seven hundred five".