78807256547 has 2 divisors, whose sum is σ = 78807256548. Its totient is φ = 78807256546.

The previous prime is 78807256543. The next prime is 78807256573. The reversal of 78807256547 is 74565270887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78807256547 - 2² = 78807256543 is a prime.

It is not a weakly prime, because it can be changed into another prime (78807256543) 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 as a sum of consecutive naturals, namely, 39403628273 + 39403628274.

It is an arithmetic number, because the mean of its divisors is an integer number (39403628274).

Almost surely, 2^78807256547 is an apocalyptic number.

78807256547 is a deficient number, since it is larger than the sum of its proper divisors (1).

78807256547 is an equidigital number, since it uses as much as digits as its factorization.

78807256547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26342400, while the sum is 59.

The spelling of 78807256547 in words is "seventy-eight billion, eight hundred seven million, two hundred fifty-six thousand, five hundred forty-seven".