165648354897 has 16 divisors (see below), whose sum is σ = 221091379200. Its totient is φ = 110318839632.

The previous prime is 165648354853. The next prime is 165648354899. The reversal of 165648354897 is 798453846561.

It is not a de Polignac number, because 165648354897 - 2²⁴ = 165631577681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165648354899) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23044738 + ... + 23051924.

It is an arithmetic number, because the mean of its divisors is an integer number (13818211200).

Almost surely, 2^165648354897 is an apocalyptic number.

It is an amenable number.

165648354897 is a deficient number, since it is larger than the sum of its proper divisors (55443024303).

165648354897 is a wasteful number, since it uses less digits than its factorization.

165648354897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14012.

The product of its digits is 174182400, while the sum is 66.

The spelling of 165648354897 in words is "one hundred sixty-five billion, six hundred forty-eight million, three hundred fifty-four thousand, eight hundred ninety-seven".