653541643 has 8 divisors (see below), whose sum is σ = 665233200. Its totient is φ = 641870688.

The previous prime is 653541601. The next prime is 653541667. The reversal of 653541643 is 346145356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 653541643 - 2²¹ = 651444491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653541673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68005 + ... + 77017.

It is an arithmetic number, because the mean of its divisors is an integer number (83154150).

Almost surely, 2^653541643 is an apocalyptic number.

653541643 is a deficient number, since it is larger than the sum of its proper divisors (11691557).

653541643 is a wasteful number, since it uses less digits than its factorization.

653541643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10301.

The product of its digits is 129600, while the sum is 37.

The square root of 653541643 is about 25564.4605458437. The cubic root of 653541643 is about 867.8095435197.

Adding to 653541643 its reverse (346145356), we get a palindrome (999686999).

The spelling of 653541643 in words is "six hundred fifty-three million, five hundred forty-one thousand, six hundred forty-three".