77806872167 has 2 divisors, whose sum is σ = 77806872168. Its totient is φ = 77806872166.

The previous prime is 77806872119. The next prime is 77806872179. The reversal of 77806872167 is 76127860877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77806872167 - 2²⁰ = 77805823591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77806872667) 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, 38903436083 + 38903436084.

It is an arithmetic number, because the mean of its divisors is an integer number (38903436084).

Almost surely, 2^77806872167 is an apocalyptic number.

77806872167 is a deficient number, since it is larger than the sum of its proper divisors (1).

77806872167 is an equidigital number, since it uses as much as digits as its factorization.

77806872167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11063808, while the sum is 59.

The spelling of 77806872167 in words is "seventy-seven billion, eight hundred six million, eight hundred seventy-two thousand, one hundred sixty-seven".