168426380077 has 2 divisors, whose sum is σ = 168426380078. Its totient is φ = 168426380076.

The previous prime is 168426380069. The next prime is 168426380117. The reversal of 168426380077 is 770083624861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126608584041 + 41817796036 = 355821^2 + 204494^2 .

It is a cyclic number.

It is not a de Polignac number, because 168426380077 - 2³ = 168426380069 is a prime.

It is a super-3 number, since 3×168426380077³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168426380477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84213190038 + 84213190039.

It is an arithmetic number, because the mean of its divisors is an integer number (84213190039).

Almost surely, 2^168426380077 is an apocalyptic number.

It is an amenable number.

168426380077 is a deficient number, since it is larger than the sum of its proper divisors (1).

168426380077 is an equidigital number, since it uses as much as digits as its factorization.

168426380077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 168426380077 in words is "one hundred sixty-eight billion, four hundred twenty-six million, three hundred eighty thousand, seventy-seven".