165000016573 has 14 divisors (see below), whose sum is σ = 192499922846. Its totient is φ = 141428484792.

The previous prime is 165000016567. The next prime is 165000016579. The reversal of 165000016573 is 375610000561.

It is an interprime number because it is at equal distance from previous prime (165000016567) and next prime (165000016579).

It can be written as a sum of positive squares in only one way, i.e., 135705297924 + 29294718649 = 368382^2 + 171157^2 .

It is a de Polignac number, because none of the positive numbers 2^k-165000016573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165000016579) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 583590 + ... + 818887.

It is an arithmetic number, because the mean of its divisors is an integer number (13749994489).

Almost surely, 2^165000016573 is an apocalyptic number.

It is an amenable number.

165000016573 is a deficient number, since it is larger than the sum of its proper divisors (27499906273).

165000016573 is an frugal number, since it uses more digits than its factorization.

165000016573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402519 (or 1402484 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The spelling of 165000016573 in words is "one hundred sixty-five billion, sixteen thousand, five hundred seventy-three".