2785044077021 has 2 divisors, whose sum is σ = 2785044077022. Its totient is φ = 2785044077020.

The previous prime is 2785044077003. The next prime is 2785044077059. The reversal of 2785044077021 is 1207704405872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2784429532921 + 614544100 = 1668661^2 + 24790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2785044077021 - 2¹⁰ = 2785044075997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2785044077821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392522038510 + 1392522038511.

It is an arithmetic number, because the mean of its divisors is an integer number (1392522038511).

Almost surely, 2^{2785044077021} is an apocalyptic number.

It is an amenable number.

2785044077021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2785044077021 is an equidigital number, since it uses as much as digits as its factorization.

2785044077021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 878080, while the sum is 47.

The spelling of 2785044077021 in words is "two trillion, seven hundred eighty-five billion, forty-four million, seventy-seven thousand, twenty-one".