6856815025441 has 16 divisors (see below), whose sum is σ = 7490907547200. Its totient is φ = 6251502535488.

The previous prime is 6856815025397. The next prime is 6856815025447. The reversal of 6856815025441 is 1445205186586.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6856815025441 - 2⁹ = 6856815024929 is a prime.

It is a super-2 number, since 2×6856815025441² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6856815025447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20098450 + ... + 20436763.

It is an arithmetic number, because the mean of its divisors is an integer number (468181721700).

Almost surely, 2^{6856815025441} is an apocalyptic number.

It is an amenable number.

6856815025441 is a deficient number, since it is larger than the sum of its proper divisors (634092521759).

6856815025441 is a wasteful number, since it uses less digits than its factorization.

6856815025441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40535568.

The product of its (nonzero) digits is 9216000, while the sum is 55.

The spelling of 6856815025441 in words is "six trillion, eight hundred fifty-six billion, eight hundred fifteen million, twenty-five thousand, four hundred forty-one".