78148471450717 has 2 divisors, whose sum is σ = 78148471450718. Its totient is φ = 78148471450716.

The previous prime is 78148471450691. The next prime is 78148471450729. The reversal of 78148471450717 is 71705417484187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41357683828036 + 36790787622681 = 6430994^2 + 6065541^2 .

It is a cyclic number.

It is not a de Polignac number, because 78148471450717 - 2³⁵ = 78114111712349 is a prime.

It is a super-2 number, since 2×78148471450717² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78148471451717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39074235725358 + 39074235725359.

It is an arithmetic number, because the mean of its divisors is an integer number (39074235725359).

Almost surely, 2^{78148471450717} is an apocalyptic number.

It is an amenable number.

78148471450717 is a deficient number, since it is larger than the sum of its proper divisors (1).

78148471450717 is an equidigital number, since it uses as much as digits as its factorization.

78148471450717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49172480, while the sum is 64.

The spelling of 78148471450717 in words is "seventy-eight trillion, one hundred forty-eight billion, four hundred seventy-one million, four hundred fifty thousand, seven hundred seventeen".