1687520517211 has 2 divisors, whose sum is σ = 1687520517212. Its totient is φ = 1687520517210.

The previous prime is 1687520517173. The next prime is 1687520517223. The reversal of 1687520517211 is 1127150257861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1687520517211 - 2⁷ = 1687520517083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1687520517271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843760258605 + 843760258606.

It is an arithmetic number, because the mean of its divisors is an integer number (843760258606).

Almost surely, 2^{1687520517211} is an apocalyptic number.

1687520517211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1687520517211 is an equidigital number, since it uses as much as digits as its factorization.

1687520517211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 46.

The spelling of 1687520517211 in words is "one trillion, six hundred eighty-seven billion, five hundred twenty million, five hundred seventeen thousand, two hundred eleven".