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BaseRepresentation
bin10011101100010000
311002122021
4103230100
510040111
61421224
7454102
oct235420
9132567
1080656
1155664
123a814
132a934
1421572
1518d71
hex13b10

80656 has 15 divisors (see below), whose sum is σ = 158503. Its totient is φ = 39760.

The previous prime is 80651. The next prime is 80657. The reversal of 80656 is 65608.

80656 = T283 + T284.

The square root of 80656 is 284.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80656.

It is not an unprimeable number, because it can be changed into a prime (80651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1101 + ... + 1171.

280656 is an apocalyptic number.

80656 is the 284-th square number.

It is an amenable number.

80656 is a deficient number, since it is larger than the sum of its proper divisors (77847).

80656 is an equidigital number, since it uses as much as digits as its factorization.

80656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The cubic root of 80656 is about 43.2061491018.

Multiplying 80656 by its sum of digits (25), we get a square (2016400 = 14202).

The spelling of 80656 in words is "eighty thousand, six hundred fifty-six".