78588036166657 has 2 divisors, whose sum is σ = 78588036166658. Its totient is φ = 78588036166656.

The previous prime is 78588036166631. The next prime is 78588036166667. The reversal of 78588036166657 is 75666163088587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78572782928641 + 15253238016 = 8864129^2 + 123504^2 .

It is an emirp because it is prime and its reverse (75666163088587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78588036166657 - 2⁷ = 78588036166529 is a prime.

It is not a weakly prime, because it can be changed into another prime (78588036166667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39294018083328 + 39294018083329.

It is an arithmetic number, because the mean of its divisors is an integer number (39294018083329).

Almost surely, 2^{78588036166657} is an apocalyptic number.

It is an amenable number.

78588036166657 is a deficient number, since it is larger than the sum of its proper divisors (1).

78588036166657 is an equidigital number, since it uses as much as digits as its factorization.

78588036166657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2438553600, while the sum is 76.

The spelling of 78588036166657 in words is "seventy-eight trillion, five hundred eighty-eight billion, thirty-six million, one hundred sixty-six thousand, six hundred fifty-seven".