78174863035481 has 2 divisors, whose sum is σ = 78174863035482. Its totient is φ = 78174863035480.

The previous prime is 78174863035429. The next prime is 78174863035553. The reversal of 78174863035481 is 18453036847187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73963096032400 + 4211767003081 = 8600180^2 + 2052259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78174863035481 is a prime.

It is a super-2 number, since 2×78174863035481² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78174863035981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39087431517740 + 39087431517741.

It is an arithmetic number, because the mean of its divisors is an integer number (39087431517741).

Almost surely, 2^{78174863035481} is an apocalyptic number.

It is an amenable number.

78174863035481 is a deficient number, since it is larger than the sum of its proper divisors (1).

78174863035481 is an equidigital number, since it uses as much as digits as its factorization.

78174863035481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108380160, while the sum is 65.

The spelling of 78174863035481 in words is "seventy-eight trillion, one hundred seventy-four billion, eight hundred sixty-three million, thirty-five thousand, four hundred eighty-one".