171332648677 has 2 divisors, whose sum is σ = 171332648678. Its totient is φ = 171332648676.

The previous prime is 171332648621. The next prime is 171332648693. The reversal of 171332648677 is 776846233171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134928390276 + 36404258401 = 367326^2 + 190799^2 .

It is a cyclic number.

It is not a de Polignac number, because 171332648677 - 2¹¹ = 171332646629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171332645677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85666324338 + 85666324339.

It is an arithmetic number, because the mean of its divisors is an integer number (85666324339).

Almost surely, 2^171332648677 is an apocalyptic number.

It is an amenable number.

171332648677 is a deficient number, since it is larger than the sum of its proper divisors (1).

171332648677 is an equidigital number, since it uses as much as digits as its factorization.

171332648677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 55.

The spelling of 171332648677 in words is "one hundred seventy-one billion, three hundred thirty-two million, six hundred forty-eight thousand, six hundred seventy-seven".