6778681808481 has 32 divisors (see below), whose sum is σ = 10969917897600. Its totient is φ = 4102864799040.

The previous prime is 6778681808477. The next prime is 6778681808489. The reversal of 6778681808481 is 1848081868776.

6778681808481 is a `hidden beast` number, since 6 + 7 + 7 + 8 + 68 + 1 + 80 + 8 + 481 = 666.

It is not a de Polignac number, because 6778681808481 - 2² = 6778681808477 is a prime.

It is a super-2 number, since 2×6778681808481² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6778681808489) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14850366 + ... + 15300023.

It is an arithmetic number, because the mean of its divisors is an integer number (342809934300).

Almost surely, 2^{6778681808481} is an apocalyptic number.

It is an amenable number.

6778681808481 is a deficient number, since it is larger than the sum of its proper divisors (4191236089119).

6778681808481 is a wasteful number, since it uses less digits than its factorization.

6778681808481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30151166 (or 30151160 counting only the distinct ones).

The product of its (nonzero) digits is 231211008, while the sum is 72.

The spelling of 6778681808481 in words is "six trillion, seven hundred seventy-eight billion, six hundred eighty-one million, eight hundred eight thousand, four hundred eighty-one".