78960438961 has 2 divisors, whose sum is σ = 78960438962. Its totient is φ = 78960438960.

The previous prime is 78960438943. The next prime is 78960438979. The reversal of 78960438961 is 16983406987.

It is a balanced prime because it is at equal distance from previous prime (78960438943) and next prime (78960438979).

It can be written as a sum of positive squares in only one way, i.e., 78592758336 + 367680625 = 280344^2 + 19175^2 .

It is an emirp because it is prime and its reverse (16983406987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78960438961 - 2¹¹ = 78960436913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78960438961.

It is not a weakly prime, because it can be changed into another prime (78960438941) 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, 39480219480 + 39480219481.

It is an arithmetic number, because the mean of its divisors is an integer number (39480219481).

Almost surely, 2^78960438961 is an apocalyptic number.

It is an amenable number.

78960438961 is a deficient number, since it is larger than the sum of its proper divisors (1).

78960438961 is an equidigital number, since it uses as much as digits as its factorization.

78960438961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 78960438961 in words is "seventy-eight billion, nine hundred sixty million, four hundred thirty-eight thousand, nine hundred sixty-one".