171677650049 has 4 divisors (see below), whose sum is σ = 181776335364. Its totient is φ = 161578964736.

The previous prime is 171677650031. The next prime is 171677650087. The reversal of 171677650049 is 940056776171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 940056776171 = 485479 ⋅1936349.

It can be written as a sum of positive squares in 2 ways, for example, as 48717318400 + 122960331649 = 220720^2 + 350657^2 .

It is a cyclic number.

It is not a de Polignac number, because 171677650049 - 2¹⁶ = 171677584513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171677650009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5049342632 + ... + 5049342665.

It is an arithmetic number, because the mean of its divisors is an integer number (45444083841).

Almost surely, 2^171677650049 is an apocalyptic number.

It is an amenable number.

171677650049 is a deficient number, since it is larger than the sum of its proper divisors (10098685315).

171677650049 is a wasteful number, since it uses less digits than its factorization.

171677650049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10098685314.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The spelling of 171677650049 in words is "one hundred seventy-one billion, six hundred seventy-seven million, six hundred fifty thousand, forty-nine".