78276994871 has 2 divisors, whose sum is σ = 78276994872. Its totient is φ = 78276994870.

The previous prime is 78276994849. The next prime is 78276994879. The reversal of 78276994871 is 17849967287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78276994871 - 2³⁰ = 77203253047 is a prime.

It is a super-2 number, since 2×78276994871² (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 (78276994879) 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, 39138497435 + 39138497436.

It is an arithmetic number, because the mean of its divisors is an integer number (39138497436).

Almost surely, 2^78276994871 is an apocalyptic number.

78276994871 is a deficient number, since it is larger than the sum of its proper divisors (1).

78276994871 is an equidigital number, since it uses as much as digits as its factorization.

78276994871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85349376, while the sum is 68.

The spelling of 78276994871 in words is "seventy-eight billion, two hundred seventy-six million, nine hundred ninety-four thousand, eight hundred seventy-one".