Search a number
-
+
161471079200 = 2552142072
BaseRepresentation
bin1001011001100001101…
…1010010001100100000
3120102210012022201021202
42112120123102030200
510121143044013300
6202102341340332
714444255345564
oct2263033221440
9512705281252
10161471079200
116253023a7a2
12273644076a8
13122c3c741a2
147b5b0496a4
154300bc2ad5
hex25986d2320

161471079200 has 54 divisors (see below), whose sum is σ = 394219020321. Its totient is φ = 64583885440.

The previous prime is 161471079191. The next prime is 161471079241. The reversal of 161471079200 is 2970174161.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 158241657616 + 3229421584 = 397796^2 + 56828^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=284140.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11358497 + ... + 11372703.

Almost surely, 2161471079200 is an apocalyptic number.

161471079200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161471079200 is an abundant number, since it is smaller than the sum of its proper divisors (232747941121).

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

161471079200 is an frugal number, since it uses more digits than its factorization.

161471079200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28434 (or 14214 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 161471079200 in words is "one hundred sixty-one billion, four hundred seventy-one million, seventy-nine thousand, two hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 160 200 400 800 14207 28414 56828 71035 113656 142070 227312 284140 355175 454624 568280 710350 1136560 1420700 2273120 2841400 5682800 11365600 201838849 403677698 807355396 1009194245 1614710792 2018388490 3229421584 4036776980 5045971225 6458843168 8073553960 10091942450 16147107920 20183884900 32294215840 40367769800 80735539600 161471079200