8040820442647 has 2 divisors, whose sum is σ = 8040820442648. Its totient is φ = 8040820442646.

The previous prime is 8040820442591. The next prime is 8040820442717. The reversal of 8040820442647 is 7462440280408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8040820442647 - 2⁷ = 8040820442519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8040820442647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8040820443647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4020410221323 + 4020410221324.

It is an arithmetic number, because the mean of its divisors is an integer number (4020410221324).

Almost surely, 2^{8040820442647} is an apocalyptic number.

8040820442647 is a deficient number, since it is larger than the sum of its proper divisors (1).

8040820442647 is an equidigital number, since it uses as much as digits as its factorization.

8040820442647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2752512, while the sum is 49.

The spelling of 8040820442647 in words is "eight trillion, forty billion, eight hundred twenty million, four hundred forty-two thousand, six hundred forty-seven".