78981708167 has 2 divisors, whose sum is σ = 78981708168. Its totient is φ = 78981708166.

The previous prime is 78981708149. The next prime is 78981708251. The reversal of 78981708167 is 76180718987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78981708167 - 2¹² = 78981704071 is a prime.

It is a super-2 number, since 2×78981708167² (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 (78981708067) 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, 39490854083 + 39490854084.

It is an arithmetic number, because the mean of its divisors is an integer number (39490854084).

Almost surely, 2^78981708167 is an apocalyptic number.

78981708167 is a deficient number, since it is larger than the sum of its proper divisors (1).

78981708167 is an equidigital number, since it uses as much as digits as its factorization.

78981708167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9483264, while the sum is 62.

The spelling of 78981708167 in words is "seventy-eight billion, nine hundred eighty-one million, seven hundred eight thousand, one hundred sixty-seven".