8371581042647 has 2 divisors, whose sum is σ = 8371581042648. Its totient is φ = 8371581042646.

The previous prime is 8371581042641. The next prime is 8371581042661. The reversal of 8371581042647 is 7462401851738.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8371581042647 - 2¹² = 8371581038551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8371581042592 and 8371581042601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8371581042641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4185790521323 + 4185790521324.

It is an arithmetic number, because the mean of its divisors is an integer number (4185790521324).

Almost surely, 2^{8371581042647} is an apocalyptic number.

8371581042647 is a deficient number, since it is larger than the sum of its proper divisors (1).

8371581042647 is an equidigital number, since it uses as much as digits as its factorization.

8371581042647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 8371581042647 in words is "eight trillion, three hundred seventy-one billion, five hundred eighty-one million, forty-two thousand, six hundred forty-seven".