170404665601 has 9 divisors (see below), whose sum is σ = 174127263361. Its totient is φ = 166760045572.

The previous prime is 170404665593. The next prime is 170404665617. The reversal of 170404665601 is 106566404071.

The square root of 170404665601 is 412801.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 170404665601 - 2³ = 170404665593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170404662601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19397256 + ... + 19406038.

Almost surely, 2^170404665601 is an apocalyptic number.

170404665601 is the 412801-st square number.

170404665601 is the 206401-st centered octagonal number.

It is an amenable number.

170404665601 is a deficient number, since it is larger than the sum of its proper divisors (3722597760).

170404665601 is an frugal number, since it uses more digits than its factorization.

170404665601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17660 (or 8830 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 170404665601 in words is "one hundred seventy billion, four hundred four million, six hundred sixty-five thousand, six hundred one".