2016061165621 has 2 divisors, whose sum is σ = 2016061165622. Its totient is φ = 2016061165620.

The previous prime is 2016061165579. The next prime is 2016061165627. The reversal of 2016061165621 is 1265611606102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2012111043121 + 3950122500 = 1418489^2 + 62850^2 .

It is a cyclic number.

It is not a de Polignac number, because 2016061165621 - 2³⁹ = 1466305351733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2016061165627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008030582810 + 1008030582811.

It is an arithmetic number, because the mean of its divisors is an integer number (1008030582811).

Almost surely, 2^{2016061165621} is an apocalyptic number.

It is an amenable number.

2016061165621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2016061165621 is an equidigital number, since it uses as much as digits as its factorization.

2016061165621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 2016061165621 in words is "two trillion, sixteen billion, sixty-one million, one hundred sixty-five thousand, six hundred twenty-one".