170001665538 has 32 divisors (see below), whose sum is σ = 341114621760. Its totient is φ = 56482092480.

The previous prime is 170001665531. The next prime is 170001665563. The reversal of 170001665538 is 835566100071.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 170001665538.

It is not an unprimeable number, because it can be changed into a prime (170001665531) 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 15 ways as a sum of consecutive naturals, for example, 10869508 + ... + 10885136.

It is an arithmetic number, because the mean of its divisors is an integer number (10659831930).

Almost surely, 2^170001665538 is an apocalyptic number.

170001665538 is an abundant number, since it is smaller than the sum of its proper divisors (171112956222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

170001665538 is a wasteful number, since it uses less digits than its factorization.

170001665538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21442.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 170001665538 in words is "one hundred seventy billion, one million, six hundred sixty-five thousand, five hundred thirty-eight".