165550206159 has 32 divisors (see below), whose sum is σ = 264200616960. Its totient is φ = 101848148064.

The previous prime is 165550206137. The next prime is 165550206167. The reversal of 165550206159 is 951602055561.

165550206159 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 5 + 0 + 20 + 615 + 9 = 666.

It is not a de Polignac number, because 165550206159 - 2⁸ = 165550205903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165550206119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1206582 + ... + 1336764.

It is an arithmetic number, because the mean of its divisors is an integer number (8256269280).

Almost surely, 2^165550206159 is an apocalyptic number.

165550206159 is a deficient number, since it is larger than the sum of its proper divisors (98650410801).

165550206159 is a wasteful number, since it uses less digits than its factorization.

165550206159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133828 (or 133822 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 45.

The spelling of 165550206159 in words is "one hundred sixty-five billion, five hundred fifty million, two hundred six thousand, one hundred fifty-nine".