32720228617 has 2 divisors, whose sum is σ = 32720228618. Its totient is φ = 32720228616.

The previous prime is 32720228609. The next prime is 32720228647. The reversal of 32720228617 is 71682202723.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24545175561 + 8175053056 = 156669^2 + 90416^2 .

It is a cyclic number.

It is not a de Polignac number, because 32720228617 - 2³ = 32720228609 is a prime.

It is a super-3 number, since 3×32720228617³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 32720228617.

It is not a weakly prime, because it can be changed into another prime (32720228647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16360114308 + 16360114309.

It is an arithmetic number, because the mean of its divisors is an integer number (16360114309).

Almost surely, 2^32720228617 is an apocalyptic number.

It is an amenable number.

32720228617 is a deficient number, since it is larger than the sum of its proper divisors (1).

32720228617 is an equidigital number, since it uses as much as digits as its factorization.

32720228617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 32720228617 in words is "thirty-two billion, seven hundred twenty million, two hundred twenty-eight thousand, six hundred seventeen".