2010721671605 has 8 divisors (see below), whose sum is σ = 2412883452600. Its totient is φ = 1608565706176.

The previous prime is 2010721671599. The next prime is 2010721671659. The reversal of 2010721671605 is 5061761270102.

It can be written as a sum of positive squares in 4 ways, for example, as 237557785201 + 1773163886404 = 487399^2 + 1331602^2 .

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 2010721671605 - 2²⁰ = 2010720623029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653150 + ... + 2109039.

It is an arithmetic number, because the mean of its divisors is an integer number (301610431575).

Almost surely, 2^{2010721671605} is an apocalyptic number.

It is an amenable number.

2010721671605 is a deficient number, since it is larger than the sum of its proper divisors (402161780995).

2010721671605 is a wasteful number, since it uses less digits than its factorization.

2010721671605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907783.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 2010721671605 in words is "two trillion, ten billion, seven hundred twenty-one million, six hundred seventy-one thousand, six hundred five".