6851809463 has 2 divisors, whose sum is σ = 6851809464. Its totient is φ = 6851809462.

The previous prime is 6851809361. The next prime is 6851809477. The reversal of 6851809463 is 3649081586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6851809463 - 2²⁴ = 6835032247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6851809493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3425904731 + 3425904732.

It is an arithmetic number, because the mean of its divisors is an integer number (3425904732).

Almost surely, 2^6851809463 is an apocalyptic number.

6851809463 is a deficient number, since it is larger than the sum of its proper divisors (1).

6851809463 is an equidigital number, since it uses as much as digits as its factorization.

6851809463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 6851809463 is about 82775.6574301890. The cubic root of 6851809463 is about 1899.3358216838.

The spelling of 6851809463 in words is "six billion, eight hundred fifty-one million, eight hundred nine thousand, four hundred sixty-three".