6828664438081 has 4 divisors (see below), whose sum is σ = 6880791647664. Its totient is φ = 6776537228500.

The previous prime is 6828664438069. The next prime is 6828664438087. The reversal of 6828664438081 is 1808344668286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6828664438081 is a prime.

It is a super-2 number, since 2×6828664438081² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6828664438087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26063604595 + ... + 26063604856.

It is an arithmetic number, because the mean of its divisors is an integer number (1720197911916).

Almost surely, 2^{6828664438081} is an apocalyptic number.

It is an amenable number.

6828664438081 is a deficient number, since it is larger than the sum of its proper divisors (52127209583).

6828664438081 is a wasteful number, since it uses less digits than its factorization.

6828664438081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52127209582.

The product of its (nonzero) digits is 84934656, while the sum is 64.

The spelling of 6828664438081 in words is "six trillion, eight hundred twenty-eight billion, six hundred sixty-four million, four hundred thirty-eight thousand, eighty-one".