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680591221187 is a prime number
BaseRepresentation
bin10011110011101100110…
…01011110000111000011
32102001201120110021111012
421321312121132013003
542122322323034222
61240354223511135
7100112453633363
oct11716631360703
92361646407435
10680591221187
11242701001929
12abaa07584ab
134c244406137
1424d2575c9a3
1512a851c31e2
hex9e7665e1c3

680591221187 has 2 divisors, whose sum is σ = 680591221188. Its totient is φ = 680591221186.

The previous prime is 680591221181. The next prime is 680591221199. The reversal of 680591221187 is 781122195086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680591221187 - 218 = 680590959043 is a prime.

It is not a weakly prime, because it can be changed into another prime (680591221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340295610593 + 340295610594.

It is an arithmetic number, because the mean of its divisors is an integer number (340295610594).

Almost surely, 2680591221187 is an apocalyptic number.

680591221187 is a deficient number, since it is larger than the sum of its proper divisors (1).

680591221187 is an equidigital number, since it uses as much as digits as its factorization.

680591221187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 680591221187 in words is "six hundred eighty billion, five hundred ninety-one million, two hundred twenty-one thousand, one hundred eighty-seven".