30778904113 has 2 divisors, whose sum is σ = 30778904114. Its totient is φ = 30778904112.

The previous prime is 30778904077. The next prime is 30778904159. The reversal of 30778904113 is 31140987703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29106748449 + 1672155664 = 170607^2 + 40892^2 .

It is a cyclic number.

It is not a de Polignac number, because 30778904113 - 2⁹ = 30778903601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30778904113.

It is not a weakly prime, because it can be changed into another prime (30778934113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15389452056 + 15389452057.

It is an arithmetic number, because the mean of its divisors is an integer number (15389452057).

Almost surely, 2^30778904113 is an apocalyptic number.

It is an amenable number.

30778904113 is a deficient number, since it is larger than the sum of its proper divisors (1).

30778904113 is an equidigital number, since it uses as much as digits as its factorization.

30778904113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 30778904113 in words is "thirty billion, seven hundred seventy-eight million, nine hundred four thousand, one hundred thirteen".