2061705728065 has 8 divisors (see below), whose sum is σ = 2474409200040. Its totient is φ = 1649123031552.

The previous prime is 2061705728009. The next prime is 2061705728113. The reversal of 2061705728065 is 5608275071602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15458446224 + 2046247281841 = 124332^2 + 1430471^2 .

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 2061705728065 - 2⁷ = 2061705727937 is a prime.

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, 30156304 + ... + 30224593.

It is an arithmetic number, because the mean of its divisors is an integer number (309301150005).

Almost surely, 2^{2061705728065} is an apocalyptic number.

It is an amenable number.

2061705728065 is a deficient number, since it is larger than the sum of its proper divisors (412703471975).

2061705728065 is an equidigital number, since it uses as much as digits as its factorization.

2061705728065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60387731.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 2061705728065 in words is "two trillion, sixty-one billion, seven hundred five million, seven hundred twenty-eight thousand, sixty-five".