170664242721 has 12 divisors (see below), whose sum is σ = 264703723632. Its totient is φ = 97522424328.

The previous prime is 170664242647. The next prime is 170664242779. The reversal of 170664242721 is 127242466071.

170664242721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 170664242721 - 2²³ = 170655854113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (170664222721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 580490475 + ... + 580490768.

It is an arithmetic number, because the mean of its divisors is an integer number (22058643636).

Almost surely, 2^170664242721 is an apocalyptic number.

It is an amenable number.

170664242721 is a deficient number, since it is larger than the sum of its proper divisors (94039480911).

170664242721 is a wasteful number, since it uses less digits than its factorization.

170664242721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160981260 (or 1160981253 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 170664242721 in words is "one hundred seventy billion, six hundred sixty-four million, two hundred forty-two thousand, seven hundred twenty-one".