6821054857 has 8 divisors (see below), whose sum is σ = 7226114976. Its totient is φ = 6416419392.

The previous prime is 6821054833. The next prime is 6821054887. The reversal of 6821054857 is 7584501286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6821054857 - 2²³ = 6812666249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6821054827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72783 + ... + 137620.

It is an arithmetic number, because the mean of its divisors is an integer number (903264372).

Almost surely, 2^6821054857 is an apocalyptic number.

It is an amenable number.

6821054857 is a deficient number, since it is larger than the sum of its proper divisors (405060119).

6821054857 is a wasteful number, since it uses less digits than its factorization.

6821054857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212327.

The product of its (nonzero) digits is 537600, while the sum is 46.

The square root of 6821054857 is about 82589.6776661587. The cubic root of 6821054857 is about 1896.4898123890.

The spelling of 6821054857 in words is "six billion, eight hundred twenty-one million, fifty-four thousand, eight hundred fifty-seven".