78286885441 has 2 divisors, whose sum is σ = 78286885442. Its totient is φ = 78286885440.

The previous prime is 78286885433. The next prime is 78286885451. The reversal of 78286885441 is 14458868287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67485648400 + 10801237041 = 259780^2 + 103929^2 .

It is an emirp because it is prime and its reverse (14458868287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78286885441 - 2³ = 78286885433 is a prime.

It is a super-2 number, since 2×78286885441² (a number of 23 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 78286885441.

It is not a weakly prime, because it can be changed into another prime (78286885451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39143442720 + 39143442721.

It is an arithmetic number, because the mean of its divisors is an integer number (39143442721).

Almost surely, 2^78286885441 is an apocalyptic number.

It is an amenable number.

78286885441 is a deficient number, since it is larger than the sum of its proper divisors (1).

78286885441 is an equidigital number, since it uses as much as digits as its factorization.

78286885441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27525120, while the sum is 61.

The spelling of 78286885441 in words is "seventy-eight billion, two hundred eighty-six million, eight hundred eighty-five thousand, four hundred forty-one".