6885648761447 has 4 divisors (see below), whose sum is σ = 6952499720400. Its totient is φ = 6818797802496.

The previous prime is 6885648761443. The next prime is 6885648761471. The reversal of 6885648761447 is 7441678465886.

6885648761447 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6885648761447 - 2² = 6885648761443 is a prime.

It is a super-2 number, since 2×6885648761447² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6885648761443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33425479322 + ... + 33425479527.

It is an arithmetic number, because the mean of its divisors is an integer number (1738124930100).

Almost surely, 2^{6885648761447} is an apocalyptic number.

6885648761447 is a deficient number, since it is larger than the sum of its proper divisors (66850958953).

6885648761447 is a wasteful number, since it uses less digits than its factorization.

6885648761447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66850958952.

The product of its digits is 1734082560, while the sum is 74.

The spelling of 6885648761447 in words is "six trillion, eight hundred eighty-five billion, six hundred forty-eight million, seven hundred sixty-one thousand, four hundred forty-seven".