6851491776 has 252 divisors, whose sum is σ = 21166348320. Its totient is φ = 2118205440.

The previous prime is 6851491769. The next prime is 6851491819. The reversal of 6851491776 is 6771941586.

6851491776 is a `hidden beast` number, since 6 + 85 + 1 + 491 + 7 + 76 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13150396 + ... + 13150916.

Almost surely, 2^6851491776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6851491776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10583174160).

6851491776 is an abundant number, since it is smaller than the sum of its proper divisors (14314856544).

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

6851491776 is a wasteful number, since it uses less digits than its factorization.

6851491776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 622 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 6851491776 is about 82773.7384440258. The cubic root of 6851491776 is about 1899.3064667313.

The spelling of 6851491776 in words is "six billion, eight hundred fifty-one million, four hundred ninety-one thousand, seven hundred seventy-six".