164178256867 has 2 divisors, whose sum is σ = 164178256868. Its totient is φ = 164178256866.

The previous prime is 164178256861. The next prime is 164178256897. The reversal of 164178256867 is 768652871461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164178256867 - 2³ = 164178256859 is a prime.

It is not a weakly prime, because it can be changed into another prime (164178256861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82089128433 + 82089128434.

It is an arithmetic number, because the mean of its divisors is an integer number (82089128434).

Almost surely, 2^164178256867 is an apocalyptic number.

164178256867 is a deficient number, since it is larger than the sum of its proper divisors (1).

164178256867 is an equidigital number, since it uses as much as digits as its factorization.

164178256867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27095040, while the sum is 61.

The spelling of 164178256867 in words is "one hundred sixty-four billion, one hundred seventy-eight million, two hundred fifty-six thousand, eight hundred sixty-seven".