206162441557 has 2 divisors, whose sum is σ = 206162441558. Its totient is φ = 206162441556.

The previous prime is 206162441533. The next prime is 206162441579. The reversal of 206162441557 is 755144261602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169221985956 + 36940455601 = 411366^2 + 192199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206162441557 is a prime.

It is a super-3 number, since 3×206162441557³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206162441357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103081220778 + 103081220779.

It is an arithmetic number, because the mean of its divisors is an integer number (103081220779).

Almost surely, 2^206162441557 is an apocalyptic number.

It is an amenable number.

206162441557 is a deficient number, since it is larger than the sum of its proper divisors (1).

206162441557 is an equidigital number, since it uses as much as digits as its factorization.

206162441557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 206162441557 in words is "two hundred six billion, one hundred sixty-two million, four hundred forty-one thousand, five hundred fifty-seven".