78555462317 has 4 divisors (see below), whose sum is σ = 78557777760. Its totient is φ = 78553146876.

The previous prime is 78555462283. The next prime is 78555462347. The reversal of 78555462317 is 71326455587.

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: 71326455587 = 2999 ⋅23783413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78555462317 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 (78555462347) 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, 1106063 + ... + 1174940.

It is an arithmetic number, because the mean of its divisors is an integer number (19639444440).

Almost surely, 2^78555462317 is an apocalyptic number.

It is an amenable number.

78555462317 is a deficient number, since it is larger than the sum of its proper divisors (2315443).

78555462317 is a wasteful number, since it uses less digits than its factorization.

78555462317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315442.

The product of its digits is 7056000, while the sum is 53.

The spelling of 78555462317 in words is "seventy-eight billion, five hundred fifty-five million, four hundred sixty-two thousand, three hundred seventeen".