1685171401675 has 6 divisors (see below), whose sum is σ = 2089612538108. Its totient is φ = 1348137121320.

The previous prime is 1685171401651. The next prime is 1685171401679. The reversal of 1685171401675 is 5761041715861.

It is not a de Polignac number, because 1685171401675 - 2²¹ = 1685169304523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685171401679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33703428009 + ... + 33703428058.

Almost surely, 2^{1685171401675} is an apocalyptic number.

1685171401675 is a deficient number, since it is larger than the sum of its proper divisors (404441136433).

1685171401675 is an equidigital number, since it uses as much as digits as its factorization.

1685171401675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67406856077 (or 67406856072 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 1685171401675 in words is "one trillion, six hundred eighty-five billion, one hundred seventy-one million, four hundred one thousand, six hundred seventy-five".