6895138771 has 2 divisors, whose sum is σ = 6895138772. Its totient is φ = 6895138770.

The previous prime is 6895138753. The next prime is 6895138777. The reversal of 6895138771 is 1778315986.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6895138771 - 2⁵ = 6895138739 is a prime.

It is not a weakly prime, because it can be changed into another prime (6895138777) 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, 3447569385 + 3447569386.

It is an arithmetic number, because the mean of its divisors is an integer number (3447569386).

Almost surely, 2^6895138771 is an apocalyptic number.

6895138771 is a deficient number, since it is larger than the sum of its proper divisors (1).

6895138771 is an equidigital number, since it uses as much as digits as its factorization.

6895138771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 55.

The square root of 6895138771 is about 83036.9723135424. The cubic root of 6895138771 is about 1903.3310698696.

The spelling of 6895138771 in words is "six billion, eight hundred ninety-five million, one hundred thirty-eight thousand, seven hundred seventy-one".