78878363298481 has 2 divisors, whose sum is σ = 78878363298482. Its totient is φ = 78878363298480.

The previous prime is 78878363298461. The next prime is 78878363298509. The reversal of 78878363298481 is 18489236387887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75500545701025 + 3377817597456 = 8689105^2 + 1837884^2 .

It is a cyclic number.

It is not a de Polignac number, because 78878363298481 - 2¹³ = 78878363290289 is a prime.

It is a super-2 number, since 2×78878363298481² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78878363298395 and 78878363298404.

It is not a weakly prime, because it can be changed into another prime (78878363298461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39439181649240 + 39439181649241.

It is an arithmetic number, because the mean of its divisors is an integer number (39439181649241).

Almost surely, 2^{78878363298481} is an apocalyptic number.

It is an amenable number.

78878363298481 is a deficient number, since it is larger than the sum of its proper divisors (1).

78878363298481 is an equidigital number, since it uses as much as digits as its factorization.

78878363298481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6242697216, while the sum is 82.

The spelling of 78878363298481 in words is "seventy-eight trillion, eight hundred seventy-eight billion, three hundred sixty-three million, two hundred ninety-eight thousand, four hundred eighty-one".