165197199505 has 32 divisors (see below), whose sum is σ = 223020532224. Its totient is φ = 116555298816.

The previous prime is 165197199473. The next prime is 165197199523. The reversal of 165197199505 is 505991791561.

It is a cyclic number.

It is not a de Polignac number, because 165197199505 - 2⁵ = 165197199473 is a prime.

It is a super-2 number, since 2×165197199505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165197199505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1263777 + ... + 1388353.

It is an arithmetic number, because the mean of its divisors is an integer number (6969391632).

Almost surely, 2^165197199505 is an apocalyptic number.

It is an amenable number.

165197199505 is a deficient number, since it is larger than the sum of its proper divisors (57823332719).

165197199505 is a wasteful number, since it uses less digits than its factorization.

165197199505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125505.

The product of its (nonzero) digits is 3827250, while the sum is 58.

The spelling of 165197199505 in words is "one hundred sixty-five billion, one hundred ninety-seven million, one hundred ninety-nine thousand, five hundred five".