84518184949613 has 2 divisors, whose sum is σ = 84518184949614. Its totient is φ = 84518184949612.

The previous prime is 84518184949589. The next prime is 84518184949651. The reversal of 84518184949613 is 31694948181548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76648151441449 + 7870033508164 = 8754893^2 + 2805358^2 .

It is a cyclic number.

It is not a de Polignac number, because 84518184949613 - 2¹² = 84518184945517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84518184942613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42259092474806 + 42259092474807.

It is an arithmetic number, because the mean of its divisors is an integer number (42259092474807).

Almost surely, 2^{84518184949613} is an apocalyptic number.

It is an amenable number.

84518184949613 is a deficient number, since it is larger than the sum of its proper divisors (1).

84518184949613 is an equidigital number, since it uses as much as digits as its factorization.

84518184949613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238878720, while the sum is 71.

The spelling of 84518184949613 in words is "eighty-four trillion, five hundred eighteen billion, one hundred eighty-four million, nine hundred forty-nine thousand, six hundred thirteen".