2028956085161 has 2 divisors, whose sum is σ = 2028956085162. Its totient is φ = 2028956085160.

The previous prime is 2028956085157. The next prime is 2028956085251. The reversal of 2028956085161 is 1615806598202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1024589328400 + 1004366756761 = 1012220^2 + 1002181^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028956085161 - 2² = 2028956085157 is a prime.

It is not a weakly prime, because it can be changed into another prime (2028956085061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014478042580 + 1014478042581.

It is an arithmetic number, because the mean of its divisors is an integer number (1014478042581).

Almost surely, 2^{2028956085161} is an apocalyptic number.

It is an amenable number.

2028956085161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028956085161 is an equidigital number, since it uses as much as digits as its factorization.

2028956085161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 53.

The spelling of 2028956085161 in words is "two trillion, twenty-eight billion, nine hundred fifty-six million, eighty-five thousand, one hundred sixty-one".