78730027117 has 4 divisors (see below), whose sum is σ = 89977173856. Its totient is φ = 67482880380.

The previous prime is 78730027099. The next prime is 78730027121. The reversal of 78730027117 is 71172003787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71172003787 = 193 ⋅368766859.

It is a cyclic number.

It is not a de Polignac number, because 78730027117 - 2¹⁹ = 78729502829 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 (78730057117) 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 in 3 ways as a sum of consecutive naturals, for example, 5623573359 + ... + 5623573372.

It is an arithmetic number, because the mean of its divisors is an integer number (22494293464).

Almost surely, 2^78730027117 is an apocalyptic number.

It is an amenable number.

78730027117 is a deficient number, since it is larger than the sum of its proper divisors (11247146739).

78730027117 is a wasteful number, since it uses less digits than its factorization.

78730027117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11247146738.

The product of its (nonzero) digits is 115248, while the sum is 43.

The spelling of 78730027117 in words is "seventy-eight billion, seven hundred thirty million, twenty-seven thousand, one hundred seventeen".