167726087768861 has 2 divisors, whose sum is σ = 167726087768862. Its totient is φ = 167726087768860.

The previous prime is 167726087768843. The next prime is 167726087768923. The reversal of 167726087768861 is 168867780627761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149694123852025 + 18031963916836 = 12234955^2 + 4246406^2 .

It is a cyclic number.

It is not a de Polignac number, because 167726087768861 - 2³⁴ = 167708907899677 is a prime.

It is a super-2 number, since 2×167726087768861² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167726087764861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83863043884430 + 83863043884431.

It is an arithmetic number, because the mean of its divisors is an integer number (83863043884431).

Almost surely, 2^{167726087768861} is an apocalyptic number.

It is an amenable number.

167726087768861 is a deficient number, since it is larger than the sum of its proper divisors (1).

167726087768861 is an equidigital number, since it uses as much as digits as its factorization.

167726087768861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3186376704, while the sum is 80.

The spelling of 167726087768861 in words is "one hundred sixty-seven trillion, seven hundred twenty-six billion, eighty-seven million, seven hundred sixty-eight thousand, eight hundred sixty-one".