779028019961 has 2 divisors, whose sum is σ = 779028019962. Its totient is φ = 779028019960.

The previous prime is 779028019907. The next prime is 779028019993. The reversal of 779028019961 is 169910820977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 747955144336 + 31072875625 = 864844^2 + 176275^2 .

It is a cyclic number.

It is not a de Polignac number, because 779028019961 - 2²⁶ = 778960911097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 779028019961.

It is not a weakly prime, because it can be changed into another prime (779028019261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389514009980 + 389514009981.

It is an arithmetic number, because the mean of its divisors is an integer number (389514009981).

Almost surely, 2^779028019961 is an apocalyptic number.

It is an amenable number.

779028019961 is a deficient number, since it is larger than the sum of its proper divisors (1).

779028019961 is an equidigital number, since it uses as much as digits as its factorization.

779028019961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3429216, while the sum is 59.

The spelling of 779028019961 in words is "seven hundred seventy-nine billion, twenty-eight million, nineteen thousand, nine hundred sixty-one".