78041779223 has 2 divisors, whose sum is σ = 78041779224. Its totient is φ = 78041779222.

The previous prime is 78041779187. The next prime is 78041779289. The reversal of 78041779223 is 32297714087.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78041779223 - 2¹⁴ = 78041762839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78041778223) 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, 39020889611 + 39020889612.

It is an arithmetic number, because the mean of its divisors is an integer number (39020889612).

Almost surely, 2^78041779223 is an apocalyptic number.

78041779223 is a deficient number, since it is larger than the sum of its proper divisors (1).

78041779223 is an equidigital number, since it uses as much as digits as its factorization.

78041779223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 78041779223 in words is "seventy-eight billion, forty-one million, seven hundred seventy-nine thousand, two hundred twenty-three".