6821054856 has 96 divisors (see below), whose sum is σ = 23032152000. Its totient is φ = 1771701120.

The previous prime is 6821054833. The next prime is 6821054887. The reversal of 6821054856 is 6584501286.

6821054856 is a `hidden beast` number, since 68 + 2 + 105 + 485 + 6 = 666.

It is a super-2 number, since 2×6821054856² = 93053578697122361472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 609631 + ... + 620718.

It is an arithmetic number, because the mean of its divisors is an integer number (239918250).

Almost surely, 2^6821054856 is an apocalyptic number.

6821054856 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6821054856 is an abundant number, since it is smaller than the sum of its proper divisors (16211097144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6821054856 is a wasteful number, since it uses less digits than its factorization.

6821054856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230379 (or 1230372 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 6821054856 is about 82589.6776601047. The cubic root of 6821054856 is about 1896.4898122964.

The spelling of 6821054856 in words is "six billion, eight hundred twenty-one million, fifty-four thousand, eight hundred fifty-six".