78500726929 has 2 divisors, whose sum is σ = 78500726930. Its totient is φ = 78500726928.

The previous prime is 78500726921. The next prime is 78500726977. The reversal of 78500726929 is 92962700587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65464339600 + 13036387329 = 255860^2 + 114177^2 .

It is a cyclic number.

It is not a de Polignac number, because 78500726929 - 2³ = 78500726921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78500726929.

It is not a weakly prime, because it can be changed into another prime (78500726921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39250363464 + 39250363465.

It is an arithmetic number, because the mean of its divisors is an integer number (39250363465).

Almost surely, 2^78500726929 is an apocalyptic number.

It is an amenable number.

78500726929 is a deficient number, since it is larger than the sum of its proper divisors (1).

78500726929 is an equidigital number, since it uses as much as digits as its factorization.

78500726929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 78500726929 in words is "seventy-eight billion, five hundred million, seven hundred twenty-six thousand, nine hundred twenty-nine".