78148168628773 has 2 divisors, whose sum is σ = 78148168628774. Its totient is φ = 78148168628772.

The previous prime is 78148168628713. The next prime is 78148168628779. The reversal of 78148168628773 is 37782686184187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39535950968644 + 38612217660129 = 6287762^2 + 6213873^2 .

It is a cyclic number.

It is not a de Polignac number, because 78148168628773 - 2³³ = 78139578694181 is a prime.

It is a super-2 number, since 2×78148168628773² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78148168628773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78148168628779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39074084314386 + 39074084314387.

It is an arithmetic number, because the mean of its divisors is an integer number (39074084314387).

Almost surely, 2^{78148168628773} is an apocalyptic number.

It is an amenable number.

78148168628773 is a deficient number, since it is larger than the sum of its proper divisors (1).

78148168628773 is an equidigital number, since it uses as much as digits as its factorization.

78148168628773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1213857792, while the sum is 76.

The spelling of 78148168628773 in words is "seventy-eight trillion, one hundred forty-eight billion, one hundred sixty-eight million, six hundred twenty-eight thousand, seven hundred seventy-three".