168880219477 has 2 divisors, whose sum is σ = 168880219478. Its totient is φ = 168880219476.

The previous prime is 168880219441. The next prime is 168880219499. The reversal of 168880219477 is 774912088861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135846793476 + 33033426001 = 368574^2 + 181751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168880219477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168880217477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84440109738 + 84440109739.

It is an arithmetic number, because the mean of its divisors is an integer number (84440109739).

Almost surely, 2^168880219477 is an apocalyptic number.

It is an amenable number.

168880219477 is a deficient number, since it is larger than the sum of its proper divisors (1).

168880219477 is an equidigital number, since it uses as much as digits as its factorization.

168880219477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10838016, while the sum is 61.

The spelling of 168880219477 in words is "one hundred sixty-eight billion, eight hundred eighty million, two hundred nineteen thousand, four hundred seventy-seven".