3600021690785 has 16 divisors (see below), whose sum is σ = 4652390228304. Its totient is φ = 2658446410752.

The previous prime is 3600021690709. The next prime is 3600021690823. The reversal of 3600021690785 is 5870961200063.

It can be written as a sum of positive squares in 8 ways, for example, as 2346481703329 + 1253539987456 = 1531823^2 + 1119616^2 .

It is a cyclic number.

It is not a de Polignac number, because 3600021690785 - 2¹² = 3600021686689 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6298469 + ... + 6846221.

It is an arithmetic number, because the mean of its divisors is an integer number (290774389269).

Almost surely, 2^{3600021690785} is an apocalyptic number.

It is an amenable number.

3600021690785 is a deficient number, since it is larger than the sum of its proper divisors (1052368537519).

3600021690785 is a wasteful number, since it uses less digits than its factorization.

3600021690785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648884.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 3600021690785 in words is "three trillion, six hundred billion, twenty-one million, six hundred ninety thousand, seven hundred eighty-five".