165235604563504 has 80 divisors (see below), whose sum is σ = 339569303673600. Its totient is φ = 77621855772672.

The previous prime is 165235604563493. The next prime is 165235604563507. The reversal of 165235604563504 is 405365406532561.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (165235604563507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1797771502 + ... + 1797863410.

It is an arithmetic number, because the mean of its divisors is an integer number (4244616295920).

Almost surely, 2^{165235604563504} is an apocalyptic number.

It is an amenable number.

165235604563504 is an abundant number, since it is smaller than the sum of its proper divisors (174333699110096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165235604563504 is a wasteful number, since it uses less digits than its factorization.

165235604563504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103430 (or 103424 counting only the distinct ones).

The product of its (nonzero) digits is 38880000, while the sum is 55.

The spelling of 165235604563504 in words is "one hundred sixty-five trillion, two hundred thirty-five billion, six hundred four million, five hundred sixty-three thousand, five hundred four".