165564455345 has 16 divisors (see below), whose sum is σ = 199474923648. Its totient is φ = 131920669440.

The previous prime is 165564455239. The next prime is 165564455359. The reversal of 165564455345 is 543554465561.

It is a de Polignac number, because none of the positive numbers 2^k-165564455345 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 1578590 + ... + 1680200.

It is an arithmetic number, because the mean of its divisors is an integer number (12467182728).

Almost surely, 2^165564455345 is an apocalyptic number.

It is an amenable number.

165564455345 is a deficient number, since it is larger than the sum of its proper divisors (33910468303).

165564455345 is a wasteful number, since it uses less digits than its factorization.

165564455345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102920.

The product of its digits is 21600000, while the sum is 53.

The spelling of 165564455345 in words is "one hundred sixty-five billion, five hundred sixty-four million, four hundred fifty-five thousand, three hundred forty-five".