2785128271 has 2 divisors, whose sum is σ = 2785128272. Its totient is φ = 2785128270.

The previous prime is 2785128221. The next prime is 2785128277. The reversal of 2785128271 is 1728215872.

2785128271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2785128271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2785128277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392564135 + 1392564136.

It is an arithmetic number, because the mean of its divisors is an integer number (1392564136).

Almost surely, 2^2785128271 is an apocalyptic number.

2785128271 is a deficient number, since it is larger than the sum of its proper divisors (1).

2785128271 is an equidigital number, since it uses as much as digits as its factorization.

2785128271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 43.

The square root of 2785128271 is about 52774.3145005219. The cubic root of 2785128271 is about 1406.9599459682.

The spelling of 2785128271 in words is "two billion, seven hundred eighty-five million, one hundred twenty-eight thousand, two hundred seventy-one".