165500564 has 48 divisors (see below), whose sum is σ = 320812800. Its totient is φ = 74390400.

The previous prime is 165500557. The next prime is 165500567. The reversal of 165500564 is 465005561.

It is a self number, because there is not a number n which added to its sum of digits gives 165500564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165500567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133829 + ... + 135059.

It is an arithmetic number, because the mean of its divisors is an integer number (6683600).

Almost surely, 2^165500564 is an apocalyptic number.

It is an amenable number.

165500564 is a deficient number, since it is larger than the sum of its proper divisors (155312236).

165500564 is a wasteful number, since it uses less digits than its factorization.

165500564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 165500564 is about 12864.7022507324. The cubic root of 165500564 is about 549.0347411058.

The spelling of 165500564 in words is "one hundred sixty-five million, five hundred thousand, five hundred sixty-four".