6856045252128 has 54 divisors (see below), whose sum is σ = 19497005050887. Its totient is φ = 2285333605440.

The previous prime is 6856045252117. The next prime is 6856045252151. The reversal of 6856045252128 is 8212525406586.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

6856045252128 is a `hidden beast` number, since 6 + 8 + 5 + 60 + 4 + 52 + 521 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3428022626064 + 3428022626064 = 1851492^2 + 1851492^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1851492.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 44358663 + ... + 44512953.

Almost surely, 2^{6856045252128} is an apocalyptic number.

It is an amenable number.

6856045252128 is an abundant number, since it is smaller than the sum of its proper divisors (12640959798759).

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

6856045252128 is an frugal number, since it uses more digits than its factorization.

6856045252128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308598 (or 154296 counting only the distinct ones).

The product of its (nonzero) digits is 9216000, while the sum is 54.

The spelling of 6856045252128 in words is "six trillion, eight hundred fifty-six billion, forty-five million, two hundred fifty-two thousand, one hundred twenty-eight".