78276867287 has 2 divisors, whose sum is σ = 78276867288. Its totient is φ = 78276867286.

The previous prime is 78276867233. The next prime is 78276867323.

78276867287 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 78276867287 - 2¹⁰ = 78276866263 is a prime.

It is a super-2 number, since 2×78276867287² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78276860287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39138433643 + 39138433644.

It is an arithmetic number, because the mean of its divisors is an integer number (39138433644).

Almost surely, 2^78276867287 is an apocalyptic number.

78276867287 is a deficient number, since it is larger than the sum of its proper divisors (1).

78276867287 is an equidigital number, since it uses as much as digits as its factorization.

78276867287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 177020928, while the sum is 68.

The spelling of 78276867287 in words is "seventy-eight billion, two hundred seventy-six million, eight hundred sixty-seven thousand, two hundred eighty-seven".