78545667587 has 2 divisors, whose sum is σ = 78545667588. Its totient is φ = 78545667586.

The previous prime is 78545667581. The next prime is 78545667601. The reversal of 78545667587 is 78576654587.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78545667587 is a prime.

It is not a weakly prime, because it can be changed into another prime (78545667581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39272833793 + 39272833794.

It is an arithmetic number, because the mean of its divisors is an integer number (39272833794).

Almost surely, 2^78545667587 is an apocalyptic number.

78545667587 is a deficient number, since it is larger than the sum of its proper divisors (1).

78545667587 is an equidigital number, since it uses as much as digits as its factorization.

78545667587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136000, while the sum is 68.

The spelling of 78545667587 in words is "seventy-eight billion, five hundred forty-five million, six hundred sixty-seven thousand, five hundred eighty-seven".