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268170161 = 7197925523
BaseRepresentation
bin11111111101111…
…11001110110001
3200200121110022012
433332333032301
51022122421121
642335452305
76434260130
oct1776771661
9620543265
10268170161
11128414236
1275987095
1343734c8c
1427889917
1518822c5b
hexffbf3b1

268170161 has 16 divisors (see below), whose sum is σ = 326707200. Its totient is φ = 214997328.

The previous prime is 268170151. The next prime is 268170169. The reversal of 268170161 is 161071862.

It is a happy number.

It is not a de Polignac number, because 268170161 - 226 = 201061297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268170169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2255 + ... + 23268.

It is an arithmetic number, because the mean of its divisors is an integer number (20419200).

Almost surely, 2268170161 is an apocalyptic number.

It is an amenable number.

268170161 is a deficient number, since it is larger than the sum of its proper divisors (58537039).

268170161 is a wasteful number, since it uses less digits than its factorization.

268170161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25628.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 268170161 is about 16375.9018377615. The cubic root of 268170161 is about 644.8669965927.

The spelling of 268170161 in words is "two hundred sixty-eight million, one hundred seventy thousand, one hundred sixty-one".

Divisors: 1 7 19 79 133 553 1501 10507 25523 178661 484937 2016317 3394559 14114219 38310023 268170161