6447893092985 has 8 divisors (see below), whose sum is σ = 7883461744200. Its totient is φ = 5060987785984.

The previous prime is 6447893092943. The next prime is 6447893092987. The reversal of 6447893092985 is 5892903987446.

6447893092985 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 85855446121 + 6362037646864 = 293011^2 + 2522308^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6447893092985 - 2¹⁴ = 6447893076601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6447893092987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12165835760 + ... + 12165836289.

It is an arithmetic number, because the mean of its divisors is an integer number (985432718025).

Almost surely, 2^{6447893092985} is an apocalyptic number.

It is an amenable number.

6447893092985 is a deficient number, since it is larger than the sum of its proper divisors (1435568651215).

6447893092985 is a wasteful number, since it uses less digits than its factorization.

6447893092985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24331672107.

The product of its (nonzero) digits is 940584960, while the sum is 74.

The spelling of 6447893092985 in words is "six trillion, four hundred forty-seven billion, eight hundred ninety-three million, ninety-two thousand, nine hundred eighty-five".