78582518591 has 2 divisors, whose sum is σ = 78582518592. Its totient is φ = 78582518590.

The previous prime is 78582518507. The next prime is 78582518617. The reversal of 78582518591 is 19581528587.

It is a strong prime.

It is an emirp because it is prime and its reverse (19581528587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78582518591 - 2¹⁸ = 78582256447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78582518591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78581518591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39291259295 + 39291259296.

It is an arithmetic number, because the mean of its divisors is an integer number (39291259296).

Almost surely, 2^78582518591 is an apocalyptic number.

78582518591 is a deficient number, since it is larger than the sum of its proper divisors (1).

78582518591 is an equidigital number, since it uses as much as digits as its factorization.

78582518591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064000, while the sum is 59.

The spelling of 78582518591 in words is "seventy-eight billion, five hundred eighty-two million, five hundred eighteen thousand, five hundred ninety-one".