78716563 has 8 divisors (see below), whose sum is σ = 83229120. Its totient is φ = 74241000.

The previous prime is 78716513. The next prime is 78716593. The reversal of 78716563 is 36561787.

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 78716563 - 2¹⁷ = 78585491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78716513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4813 + ... + 13438.

It is an arithmetic number, because the mean of its divisors is an integer number (10403640).

Almost surely, 2^78716563 is an apocalyptic number.

78716563 is a deficient number, since it is larger than the sum of its proper divisors (4512557).

78716563 is a wasteful number, since it uses less digits than its factorization.

78716563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18497.

The product of its digits is 211680, while the sum is 43.

The square root of 78716563 is about 8872.2355131049. The cubic root of 78716563 is about 428.5702704149.

The spelling of 78716563 in words is "seventy-eight million, seven hundred sixteen thousand, five hundred sixty-three".