206165216056580 has 48 divisors (see below), whose sum is σ = 472306818896640. Its totient is φ = 74969002617600.

The previous prime is 206165216056567. The next prime is 206165216056633. The reversal of 206165216056580 is 85650612561602.

It is a happy number.

It is a super-2 number, since 2×206165216056580² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 143382656 + ... + 144813384.

It is an arithmetic number, because the mean of its divisors is an integer number (9839725393680).

Almost surely, 2^{206165216056580} is an apocalyptic number.

206165216056580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206165216056580 is an abundant number, since it is smaller than the sum of its proper divisors (266141602840060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206165216056580 is a wasteful number, since it uses less digits than its factorization.

206165216056580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085740 (or 2085738 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 53.

The spelling of 206165216056580 in words is "two hundred six trillion, one hundred sixty-five billion, two hundred sixteen million, fifty-six thousand, five hundred eighty".