78585446587 has 2 divisors, whose sum is σ = 78585446588. Its totient is φ = 78585446586.

The previous prime is 78585446573. The next prime is 78585446609. The reversal of 78585446587 is 78564458587.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78585446587 is a prime.

It is not a weakly prime, because it can be changed into another prime (78585446557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39292723293 + 39292723294.

It is an arithmetic number, because the mean of its divisors is an integer number (39292723294).

Almost surely, 2^78585446587 is an apocalyptic number.

78585446587 is a deficient number, since it is larger than the sum of its proper divisors (1).

78585446587 is an equidigital number, since it uses as much as digits as its factorization.

78585446587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056000, while the sum is 67.

The spelling of 78585446587 in words is "seventy-eight billion, five hundred eighty-five million, four hundred forty-six thousand, five hundred eighty-seven".