206505060001 has 2 divisors, whose sum is σ = 206505060002. Its totient is φ = 206505060000.

The previous prime is 206505059977. The next prime is 206505060023. The reversal of 206505060001 is 100060505602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191541899025 + 14963160976 = 437655^2 + 122324^2 .

It is a cyclic number.

It is not a de Polignac number, because 206505060001 - 2²⁷ = 206370842273 is a prime.

It is a super-2 number, since 2×206505060001² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206505060061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103252530000 + 103252530001.

It is an arithmetic number, because the mean of its divisors is an integer number (103252530001).

Almost surely, 2^206505060001 is an apocalyptic number.

It is an amenable number.

206505060001 is a deficient number, since it is larger than the sum of its proper divisors (1).

206505060001 is an equidigital number, since it uses as much as digits as its factorization.

206505060001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 206505060001 its reverse (100060505602), we get a palindrome (306565565603).

The spelling of 206505060001 in words is "two hundred six billion, five hundred five million, sixty thousand, one".