78218582341057 has 2 divisors, whose sum is σ = 78218582341058. Its totient is φ = 78218582341056.

The previous prime is 78218582340947. The next prime is 78218582341063. The reversal of 78218582341057 is 75014328581287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75195796745601 + 3022785595456 = 8671551^2 + 1738616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78218582341057 is a prime.

It is a super-2 number, since 2×78218582341057² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78218582340986 and 78218582341004.

It is not a weakly prime, because it can be changed into another prime (78218582341087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39109291170528 + 39109291170529.

It is an arithmetic number, because the mean of its divisors is an integer number (39109291170529).

Almost surely, 2^{78218582341057} is an apocalyptic number.

It is an amenable number.

78218582341057 is a deficient number, since it is larger than the sum of its proper divisors (1).

78218582341057 is an equidigital number, since it uses as much as digits as its factorization.

78218582341057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30105600, while the sum is 61.

The spelling of 78218582341057 in words is "seventy-eight trillion, two hundred eighteen billion, five hundred eighty-two million, three hundred forty-one thousand, fifty-seven".