165500649986 has 16 divisors (see below), whose sum is σ = 286226158464. Its totient is φ = 70301160384.

The previous prime is 165500649971. The next prime is 165500649989. The reversal of 165500649986 is 689946005561.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165500649989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52305830 + ... + 52308993.

It is an arithmetic number, because the mean of its divisors is an integer number (17889134904).

Almost surely, 2^165500649986 is an apocalyptic number.

165500649986 is a deficient number, since it is larger than the sum of its proper divisors (120725508478).

165500649986 is a wasteful number, since it uses less digits than its factorization.

165500649986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104614945.

The product of its (nonzero) digits is 13996800, while the sum is 59.

The spelling of 165500649986 in words is "one hundred sixty-five billion, five hundred million, six hundred forty-nine thousand, nine hundred eighty-six".