6885348521 has 2 divisors, whose sum is σ = 6885348522. Its totient is φ = 6885348520.

The previous prime is 6885348451. The next prime is 6885348553. The reversal of 6885348521 is 1258435886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5550250000 + 1335098521 = 74500^2 + 36539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6885348521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6885348521.

It is not a weakly prime, because it can be changed into another prime (6885348121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3442674260 + 3442674261.

It is an arithmetic number, because the mean of its divisors is an integer number (3442674261).

Almost surely, 2^6885348521 is an apocalyptic number.

It is an amenable number.

6885348521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6885348521 is an equidigital number, since it uses as much as digits as its factorization.

6885348521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1843200, while the sum is 50.

The square root of 6885348521 is about 82978.0002229507. Note that the first 3 decimals coincide. The cubic root of 6885348521 is about 1902.4298110764.

The spelling of 6885348521 in words is "six billion, eight hundred eighty-five million, three hundred forty-eight thousand, five hundred twenty-one".