6821498851 has 2 divisors, whose sum is σ = 6821498852. Its totient is φ = 6821498850.

The previous prime is 6821498837. The next prime is 6821498899. The reversal of 6821498851 is 1588941286.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6821498851 - 2¹³ = 6821490659 is a prime.

It is not a weakly prime, because it can be changed into another prime (6821499851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410749425 + 3410749426.

It is an arithmetic number, because the mean of its divisors is an integer number (3410749426).

Almost surely, 2^6821498851 is an apocalyptic number.

6821498851 is a deficient number, since it is larger than the sum of its proper divisors (1).

6821498851 is an equidigital number, since it uses as much as digits as its factorization.

6821498851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 52.

The square root of 6821498851 is about 82592.3655733386. The cubic root of 6821498851 is about 1896.5309600730.

The spelling of 6821498851 in words is "six billion, eight hundred twenty-one million, four hundred ninety-eight thousand, eight hundred fifty-one".