78881218887 has 8 divisors (see below), whose sum is σ = 105445332720. Its totient is φ = 52452292160.

The previous prime is 78881218817. The next prime is 78881218901.

78881218887 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78881218887 - 2⁸ = 78881218631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78881218817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33795414 + ... + 33797747.

It is an arithmetic number, because the mean of its divisors is an integer number (13180666590).

Almost surely, 2^78881218887 is an apocalyptic number.

78881218887 is a deficient number, since it is larger than the sum of its proper divisors (26564113833).

78881218887 is a wasteful number, since it uses less digits than its factorization.

78881218887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67593553.

The product of its digits is 25690112, while the sum is 66.

The spelling of 78881218887 in words is "seventy-eight billion, eight hundred eighty-one million, two hundred eighteen thousand, eight hundred eighty-seven".