78560405117 has 4 divisors (see below), whose sum is σ = 83181605436. Its totient is φ = 73939204800.

The previous prime is 78560405113. The next prime is 78560405137. The reversal of 78560405117 is 71150406587.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31964433796 + 46595971321 = 178786^2 + 215861^2 .

It is a cyclic number.

It is not a de Polignac number, because 78560405117 - 2² = 78560405113 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 (78560405113) 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, 2310600134 + ... + 2310600167.

It is an arithmetic number, because the mean of its divisors is an integer number (20795401359).

Almost surely, 2^78560405117 is an apocalyptic number.

It is an amenable number.

78560405117 is a deficient number, since it is larger than the sum of its proper divisors (4621200319).

78560405117 is a wasteful number, since it uses less digits than its factorization.

78560405117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4621200318.

The product of its (nonzero) digits is 235200, while the sum is 44.

The spelling of 78560405117 in words is "seventy-eight billion, five hundred sixty million, four hundred five thousand, one hundred seventeen".