163665530545 has 16 divisors (see below), whose sum is σ = 215888587200. Its totient is φ = 118120849600.

The previous prime is 163665530521. The next prime is 163665530563. The reversal of 163665530545 is 545035566361.

It is not a de Polignac number, because 163665530545 - 2⁹ = 163665530033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11350570 + ... + 11364979.

It is an arithmetic number, because the mean of its divisors is an integer number (13493036700).

Almost surely, 2^163665530545 is an apocalyptic number.

It is an amenable number.

163665530545 is a deficient number, since it is larger than the sum of its proper divisors (52223056655).

163665530545 is a wasteful number, since it uses less digits than its factorization.

163665530545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715696.

The product of its (nonzero) digits is 4860000, while the sum is 49.

The spelling of 163665530545 in words is "one hundred sixty-three billion, six hundred sixty-five million, five hundred thirty thousand, five hundred forty-five".