7844642464487 has 2 divisors, whose sum is σ = 7844642464488. Its totient is φ = 7844642464486.

The previous prime is 7844642464459. The next prime is 7844642464493.

7844642464487 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 7844642464487 - 2¹⁴ = 7844642448103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7844642464787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3922321232243 + 3922321232244.

It is an arithmetic number, because the mean of its divisors is an integer number (3922321232244).

Almost surely, 2^{7844642464487} is an apocalyptic number.

7844642464487 is a deficient number, since it is larger than the sum of its proper divisors (1).

7844642464487 is an equidigital number, since it uses as much as digits as its factorization.

7844642464487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 924844032, while the sum is 68.

The spelling of 7844642464487 in words is "seven trillion, eight hundred forty-four billion, six hundred forty-two million, four hundred sixty-four thousand, four hundred eighty-seven".