201605141693 has 4 divisors (see below), whose sum is σ = 201880183548. Its totient is φ = 201330099840.

The previous prime is 201605141623. The next prime is 201605141723. The reversal of 201605141693 is 396141506102.

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 198369579769 + 3235561924 = 445387^2 + 56882^2 .

It is a cyclic number.

It is not a de Polignac number, because 201605141693 - 2¹⁸ = 201604879549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201605141623) 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, 137519828 + ... + 137521293.

It is an arithmetic number, because the mean of its divisors is an integer number (50470045887).

Almost surely, 2^201605141693 is an apocalyptic number.

It is an amenable number.

201605141693 is a deficient number, since it is larger than the sum of its proper divisors (275041855).

201605141693 is an equidigital number, since it uses as much as digits as its factorization.

201605141693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275041854.

The product of its (nonzero) digits is 38880, while the sum is 38.

Adding to 201605141693 its reverse (396141506102), we get a palindrome (597746647795).

The spelling of 201605141693 in words is "two hundred one billion, six hundred five million, one hundred forty-one thousand, six hundred ninety-three".