2061705143405 has 8 divisors (see below), whose sum is σ = 2477314401432. Its totient is φ = 1647185295168.

The previous prime is 2061705143401. The next prime is 2061705143413. The reversal of 2061705143405 is 5043415071602.

It can be written as a sum of positive squares in 4 ways, for example, as 667052793289 + 1394652350116 = 816733^2 + 1180954^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2061705143405 - 2² = 2061705143401 is a prime.

It is a super-2 number, since 2×2061705143405² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061705143401) 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, 272348282 + ... + 272355851.

It is an arithmetic number, because the mean of its divisors is an integer number (309664300179).

Almost surely, 2^{2061705143405} is an apocalyptic number.

It is an amenable number.

2061705143405 is a deficient number, since it is larger than the sum of its proper divisors (415609258027).

2061705143405 is an equidigital number, since it uses as much as digits as its factorization.

2061705143405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544704895.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 2061705143405 in words is "two trillion, sixty-one billion, seven hundred five million, one hundred forty-three thousand, four hundred five".