78826448287 has 4 divisors (see below), whose sum is σ = 78942883896. Its totient is φ = 78710012680.

The previous prime is 78826448257. The next prime is 78826448299. The reversal of 78826448287 is 78284462887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78284462887 = 103 ⋅760043329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78826448287 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 (78826448257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58216789 + ... + 58218142.

It is an arithmetic number, because the mean of its divisors is an integer number (19735720974).

Almost surely, 2^78826448287 is an apocalyptic number.

78826448287 is a deficient number, since it is larger than the sum of its proper divisors (116435609).

78826448287 is a wasteful number, since it uses less digits than its factorization.

78826448287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116435608.

The product of its digits is 77070336, while the sum is 64.

The spelling of 78826448287 in words is "seventy-eight billion, eight hundred twenty-six million, four hundred forty-eight thousand, two hundred eighty-seven".