652720841321 has 8 divisors (see below), whose sum is σ = 663442118088. Its totient is φ = 642000240000.

The previous prime is 652720841317. The next prime is 652720841347. The reversal of 652720841321 is 123148027256.

It can be written as a sum of positive squares in 4 ways, for example, as 4149936400 + 648570904921 = 64420^2 + 805339^2 .

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 652720841321 - 2² = 652720841317 is a prime.

It is a super-2 number, since 2×652720841321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (652720841371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2008331 + ... + 2310591.

It is an arithmetic number, because the mean of its divisors is an integer number (82930264761).

Almost surely, 2^652720841321 is an apocalyptic number.

652720841321 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

652720841321 is a deficient number, since it is larger than the sum of its proper divisors (10721276767).

652720841321 is a wasteful number, since it uses less digits than its factorization.

652720841321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337723.

The product of its (nonzero) digits is 161280, while the sum is 41.

Adding to 652720841321 its reverse (123148027256), we get a palindrome (775868868577).

The spelling of 652720841321 in words is "six hundred fifty-two billion, seven hundred twenty million, eight hundred forty-one thousand, three hundred twenty-one".