1601323653 has 16 divisors (see below), whose sum is σ = 2338649280. Its totient is φ = 970104576.

The previous prime is 1601323639. The next prime is 1601323657. The reversal of 1601323653 is 3563231061.

It is a happy number.

It is not a de Polignac number, because 1601323653 - 2⁵ = 1601323621 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1601323653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601323657) 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, 539875 + ... + 542832.

It is an arithmetic number, because the mean of its divisors is an integer number (146165580).

Almost surely, 2^1601323653 is an apocalyptic number.

It is an amenable number.

1601323653 is a deficient number, since it is larger than the sum of its proper divisors (737325627).

1601323653 is a wasteful number, since it uses less digits than its factorization.

1601323653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082756.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 1601323653 is about 40016.5422419279. The cubic root of 1601323653 is about 1169.9295384552.

The spelling of 1601323653 in words is "one billion, six hundred one million, three hundred twenty-three thousand, six hundred fifty-three".