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12580500917 = 73449383821
BaseRepresentation
bin10111011011101101…
…10011010110110101
31012110202102122220102
423231312303112311
5201231102012132
65440203443445
7623520331145
oct135566632665
935422378812
1012580500917
1153764015a6
122531226585
1312564c3caa
14874b6a925
154d96dac62
hex2eddb35b5

12580500917 has 8 divisors (see below), whose sum is σ = 12781272600. Its totient is φ = 12380497920.

The previous prime is 12580500901. The next prime is 12580500931. The reversal of 12580500917 is 71900508521.

It can be written as a sum of positive squares in 4 ways, for example, as 3610327396 + 8970173521 = 60086^2 + 94711^2 .

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 12580500917 - 24 = 12580500901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12580500937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159134 + ... + 224687.

It is an arithmetic number, because the mean of its divisors is an integer number (1597659075).

Almost surely, 212580500917 is an apocalyptic number.

It is an amenable number.

12580500917 is a deficient number, since it is larger than the sum of its proper divisors (200771683).

12580500917 is an equidigital number, since it uses as much as digits as its factorization.

12580500917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384343.

The product of its (nonzero) digits is 25200, while the sum is 38.

The spelling of 12580500917 in words is "twelve billion, five hundred eighty million, five hundred thousand, nine hundred seventeen".

Divisors: 1 73 449 32777 383821 28018933 172335629 12580500917