165169803953 has 16 divisors (see below), whose sum is σ = 207748354176. Its totient is φ = 127564765440.

The previous prime is 165169803907. The next prime is 165169804013. The reversal of 165169803953 is 359308961561.

It is a happy number.

165169803953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165169803953 - 2¹⁶ = 165169738417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165169808953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9482726 + ... + 9500127.

It is an arithmetic number, because the mean of its divisors is an integer number (12984272136).

Almost surely, 2^165169803953 is an apocalyptic number.

It is an amenable number.

165169803953 is a deficient number, since it is larger than the sum of its proper divisors (42578550223).

165169803953 is a wasteful number, since it uses less digits than its factorization.

165169803953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18982984.

The product of its (nonzero) digits is 5248800, while the sum is 56.

The spelling of 165169803953 in words is "one hundred sixty-five billion, one hundred sixty-nine million, eight hundred three thousand, nine hundred fifty-three".