78417876827 has 2 divisors, whose sum is σ = 78417876828. Its totient is φ = 78417876826.

The previous prime is 78417876767. The next prime is 78417876829. The reversal of 78417876827 is 72867871487.

It is a strong prime.

It is an emirp because it is prime and its reverse (72867871487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78417876827 - 2¹⁸ = 78417614683 is a prime.

It is a super-2 number, since 2×78417876827² (a number of 23 digits) contains 22 as substring.

Together with 78417876829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78417876829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39208938413 + 39208938414.

It is an arithmetic number, because the mean of its divisors is an integer number (39208938414).

Almost surely, 2^78417876827 is an apocalyptic number.

78417876827 is a deficient number, since it is larger than the sum of its proper divisors (1).

78417876827 is an equidigital number, since it uses as much as digits as its factorization.

78417876827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59006976, while the sum is 65.

The spelling of 78417876827 in words is "seventy-eight billion, four hundred seventeen million, eight hundred seventy-six thousand, eight hundred twenty-seven".