778218743041 has 2 divisors, whose sum is σ = 778218743042. Its totient is φ = 778218743040.

The previous prime is 778218742993. The next prime is 778218743129. The reversal of 778218743041 is 140347812877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629142444225 + 149076298816 = 793185^2 + 386104^2 .

It is an emirp because it is prime and its reverse (140347812877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 778218743041 - 2³³ = 769628808449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 778218743041.

It is not a weakly prime, because it can be changed into another prime (778218747041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389109371520 + 389109371521.

It is an arithmetic number, because the mean of its divisors is an integer number (389109371521).

Almost surely, 2^778218743041 is an apocalyptic number.

It is an amenable number.

778218743041 is a deficient number, since it is larger than the sum of its proper divisors (1).

778218743041 is an equidigital number, since it uses as much as digits as its factorization.

778218743041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2107392, while the sum is 52.

The spelling of 778218743041 in words is "seven hundred seventy-eight billion, two hundred eighteen million, seven hundred forty-three thousand, forty-one".