521860166280017 has 32 divisors (see below), whose sum is σ = 567549956887200. Its totient is φ = 477901638860800.

The previous prime is 521860166280001. The next prime is 521860166280223. The reversal of 521860166280017 is 710082661068125.

It can be written as a sum of positive squares in 16 ways, for example, as 237245754950656 + 284614411329361 = 15402784^2 + 16870519^2 .

It is a cyclic number.

It is not a de Polignac number, because 521860166280017 - 2⁴ = 521860166280001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521860166280317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 499353167 + ... + 500397147.

It is an arithmetic number, because the mean of its divisors is an integer number (17735936152725).

Almost surely, 2^{521860166280017} is an apocalyptic number.

It is an amenable number.

521860166280017 is a deficient number, since it is larger than the sum of its proper divisors (45689790607183).

521860166280017 is a wasteful number, since it uses less digits than its factorization.

521860166280017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045957.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 521860166280017 in words is "five hundred twenty-one trillion, eight hundred sixty billion, one hundred sixty-six million, two hundred eighty thousand, seventeen".