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380660161 = 783655181
BaseRepresentation
bin10110101100000…
…110100111000001
3222112021112120111
4112230012213001
51234422111121
6101434511321
712301362250
oct2654064701
9875245514
10380660161
11185966682
12a7595541
1360b2c7cb
14387ac797
15236432e1
hex16b069c1

380660161 has 8 divisors (see below), whose sum is σ = 440282304. Its totient is φ = 322348560.

The previous prime is 380660101. The next prime is 380660167. The reversal of 380660161 is 161066083.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 380660161 - 213 = 380651969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (380660167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327010 + ... + 328171.

It is an arithmetic number, because the mean of its divisors is an integer number (55035288).

Almost surely, 2380660161 is an apocalyptic number.

It is an amenable number.

380660161 is a deficient number, since it is larger than the sum of its proper divisors (59622143).

380660161 is an equidigital number, since it uses as much as digits as its factorization.

380660161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655271.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 380660161 is about 19510.5141141898. The cubic root of 380660161 is about 724.7348446136.

The spelling of 380660161 in words is "three hundred eighty million, six hundred sixty thousand, one hundred sixty-one".

Divisors: 1 7 83 581 655181 4586267 54380023 380660161