1601601273 has 6 divisors (see below), whose sum is σ = 2313424074. Its totient is φ = 1067734176.

The previous prime is 1601601271. The next prime is 1601601289. The reversal of 1601601273 is 3721061061.

It can be written as a sum of positive squares in only one way, i.e., 966712464 + 634888809 = 31092^2 + 25197^2 .

It is not a de Polignac number, because 1601601273 - 2¹ = 1601601271 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1601601271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88977840 + ... + 88977857.

It is an arithmetic number, because the mean of its divisors is an integer number (385570679).

Almost surely, 2^1601601273 is an apocalyptic number.

It is an amenable number.

1601601273 is a deficient number, since it is larger than the sum of its proper divisors (711822801).

1601601273 is a wasteful number, since it uses less digits than its factorization.

1601601273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177955703 (or 177955700 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1601601273 is about 40020.0109070450. The cubic root of 1601601273 is about 1169.9971444156.

The spelling of 1601601273 in words is "one billion, six hundred one million, six hundred one thousand, two hundred seventy-three".