78468139073 has 2 divisors, whose sum is σ = 78468139074. Its totient is φ = 78468139072.

The previous prime is 78468139051. The next prime is 78468139093. The reversal of 78468139073 is 37093186487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72766681009 + 5701458064 = 269753^2 + 75508^2 .

It is a cyclic number.

It is not a de Polignac number, because 78468139073 - 2¹² = 78468134977 is a prime.

It is not a weakly prime, because it can be changed into another prime (78468139003) 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, 39234069536 + 39234069537.

It is an arithmetic number, because the mean of its divisors is an integer number (39234069537).

Almost surely, 2^78468139073 is an apocalyptic number.

It is an amenable number.

78468139073 is a deficient number, since it is larger than the sum of its proper divisors (1).

78468139073 is an equidigital number, since it uses as much as digits as its factorization.

78468139073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 78468139073 in words is "seventy-eight billion, four hundred sixty-eight million, one hundred thirty-nine thousand, seventy-three".