171870655 has 16 divisors (see below), whose sum is σ = 227066400. Its totient is φ = 123845760.

The previous prime is 171870649. The next prime is 171870701. The reversal of 171870655 is 556078171.

It is not a de Polignac number, because 171870655 - 2¹¹ = 171868607 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 8340 + ... + 20329.

It is an arithmetic number, because the mean of its divisors is an integer number (14191650).

Almost surely, 2^171870655 is an apocalyptic number.

171870655 is a deficient number, since it is larger than the sum of its proper divisors (55195745).

171870655 is a wasteful number, since it uses less digits than its factorization.

171870655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28794.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 171870655 is about 13109.9448892816. The cubic root of 171870655 is about 555.9903374181.

The spelling of 171870655 in words is "one hundred seventy-one million, eight hundred seventy thousand, six hundred fifty-five".