78859855895887 has 12 divisors (see below), whose sum is σ = 87654608153280. Its totient is φ = 70885263716960.

The previous prime is 78859855895861. The next prime is 78859855895941.

78859855895887 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78859855895887 - 2¹⁹ = 78859855371599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78859855895792 and 78859855895801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78859855895827) 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 11 ways as a sum of consecutive naturals, for example, 3661418143 + ... + 3661439680.

It is an arithmetic number, because the mean of its divisors is an integer number (7304550679440).

Almost surely, 2^{78859855895887} is an apocalyptic number.

78859855895887 is a deficient number, since it is larger than the sum of its proper divisors (8794752257393).

78859855895887 is a wasteful number, since it uses less digits than its factorization.

78859855895887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322857934 (or 7322857923 counting only the distinct ones).

The product of its digits is 650280960000, while the sum is 100.

The spelling of 78859855895887 in words is "seventy-eight trillion, eight hundred fifty-nine billion, eight hundred fifty-five million, eight hundred ninety-five thousand, eight hundred eighty-seven".