78782269568 has 24 divisors (see below), whose sum is σ = 156955379205. Its totient is φ = 39389547008.

The previous prime is 78782269561. The next prime is 78782269591. The reversal of 78782269568 is 86596228787.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 65212815424 + 13569454144 = 255368^2 + 116488^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=198472.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78782269498 and 78782269507.

It is not an unprimeable number, because it can be changed into a prime (78782269561) 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 2 ways as a sum of consecutive naturals, for example, 3163148 + ... + 3187956.

Almost surely, 2^78782269568 is an apocalyptic number.

It is an amenable number.

78782269568 is a deficient number, since it is larger than the sum of its proper divisors (78173109637).

78782269568 is an frugal number, since it uses more digits than its factorization.

78782269568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49632 (or 24811 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 68.

The spelling of 78782269568 in words is "seventy-eight billion, seven hundred eighty-two million, two hundred sixty-nine thousand, five hundred sixty-eight".