78935844587 has 2 divisors, whose sum is σ = 78935844588. Its totient is φ = 78935844586.

The previous prime is 78935844583. The next prime is 78935844683. The reversal of 78935844587 is 78544853987.

It is a weak prime.

It is an emirp because it is prime and its reverse (78544853987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78935844587 - 2² = 78935844583 is a prime.

It is not a weakly prime, because it can be changed into another prime (78935844583) 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, 39467922293 + 39467922294.

It is an arithmetic number, because the mean of its divisors is an integer number (39467922294).

Almost surely, 2^78935844587 is an apocalyptic number.

78935844587 is a deficient number, since it is larger than the sum of its proper divisors (1).

78935844587 is an equidigital number, since it uses as much as digits as its factorization.

78935844587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270950400, while the sum is 68.

The spelling of 78935844587 in words is "seventy-eight billion, nine hundred thirty-five million, eight hundred forty-four thousand, five hundred eighty-seven".