78546922673 has 2 divisors, whose sum is σ = 78546922674. Its totient is φ = 78546922672.

The previous prime is 78546922661. The next prime is 78546922693. The reversal of 78546922673 is 37622964587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62456507569 + 16090415104 = 249913^2 + 126848^2 .

It is a cyclic number.

It is not a de Polignac number, because 78546922673 - 2¹⁴ = 78546906289 is a prime.

It is a super-2 number, since 2×78546922673² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78546922613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39273461336 + 39273461337.

It is an arithmetic number, because the mean of its divisors is an integer number (39273461337).

Almost surely, 2^78546922673 is an apocalyptic number.

It is an amenable number.

78546922673 is a deficient number, since it is larger than the sum of its proper divisors (1).

78546922673 is an equidigital number, since it uses as much as digits as its factorization.

78546922673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 59.

The spelling of 78546922673 in words is "seventy-eight billion, five hundred forty-six million, nine hundred twenty-two thousand, six hundred seventy-three".