170549912009 has 2 divisors, whose sum is σ = 170549912010. Its totient is φ = 170549912008.

The previous prime is 170549911993. The next prime is 170549912089. The reversal of 170549912009 is 900219945071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129855726025 + 40694185984 = 360355^2 + 201728^2 .

It is a cyclic number.

It is not a de Polignac number, because 170549912009 - 2⁴ = 170549911993 is a prime.

It is not a weakly prime, because it can be changed into another prime (170549912089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85274956004 + 85274956005.

It is an arithmetic number, because the mean of its divisors is an integer number (85274956005).

Almost surely, 2^170549912009 is an apocalyptic number.

It is an amenable number.

170549912009 is a deficient number, since it is larger than the sum of its proper divisors (1).

170549912009 is an equidigital number, since it uses as much as digits as its factorization.

170549912009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 170549912009 in words is "one hundred seventy billion, five hundred forty-nine million, nine hundred twelve thousand, nine".