78850774243 has 2 divisors, whose sum is σ = 78850774244. Its totient is φ = 78850774242.

The previous prime is 78850774201. The next prime is 78850774279. The reversal of 78850774243 is 34247705887.

It is a strong prime.

It is an emirp because it is prime and its reverse (34247705887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78850774243 - 2⁹ = 78850773731 is a prime.

It is not a weakly prime, because it can be changed into another prime (78850774283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39425387121 + 39425387122.

It is an arithmetic number, because the mean of its divisors is an integer number (39425387122).

Almost surely, 2^78850774243 is an apocalyptic number.

78850774243 is a deficient number, since it is larger than the sum of its proper divisors (1).

78850774243 is an equidigital number, since it uses as much as digits as its factorization.

78850774243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10536960, while the sum is 55.

The spelling of 78850774243 in words is "seventy-eight billion, eight hundred fifty million, seven hundred seventy-four thousand, two hundred forty-three".