6851470644 has 48 divisors (see below), whose sum is σ = 18535386240. Its totient is φ = 2184526080.

The previous prime is 6851470607. The next prime is 6851470663. The reversal of 6851470644 is 4460741586.

6851470644 is a `hidden beast` number, since 6 + 8 + 514 + 70 + 64 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6851470644.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1376637 + ... + 1381604.

It is an arithmetic number, because the mean of its divisors is an integer number (386153880).

Almost surely, 2^6851470644 is an apocalyptic number.

It is an amenable number.

6851470644 is an abundant number, since it is smaller than the sum of its proper divisors (11683915596).

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

6851470644 is a wasteful number, since it uses less digits than its factorization.

6851470644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758277 (or 2758269 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 6851470644 is about 82773.6107947454. The cubic root of 6851470644 is about 1899.3045140575.

The spelling of 6851470644 in words is "six billion, eight hundred fifty-one million, four hundred seventy thousand, six hundred forty-four".