78585687632911 has 4 divisors (see below), whose sum is σ = 78585705370000. Its totient is φ = 78585669895824.

The previous prime is 78585687632909. The next prime is 78585687632929. The reversal of 78585687632911 is 11923678658587.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 78585687632911 - 2¹ = 78585687632909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78585687632951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4050715 + ... + 13174963.

It is an arithmetic number, because the mean of its divisors is an integer number (19646426342500).

Almost surely, 2^{78585687632911} is an apocalyptic number.

78585687632911 is a deficient number, since it is larger than the sum of its proper divisors (17737089).

78585687632911 is an equidigital number, since it uses as much as digits as its factorization.

78585687632911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17737088.

The product of its digits is 1219276800, while the sum is 76.

The spelling of 78585687632911 in words is "seventy-eight trillion, five hundred eighty-five billion, six hundred eighty-seven million, six hundred thirty-two thousand, nine hundred eleven".