172281064513 has 4 divisors (see below), whose sum is σ = 172286776368. Its totient is φ = 172275352660.

The previous prime is 172281064499. The next prime is 172281064517. The reversal of 172281064513 is 315460182271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172281064513 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172281064517) 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 3 ways as a sum of consecutive naturals, for example, 2810443 + ... + 2871088.

It is an arithmetic number, because the mean of its divisors is an integer number (43071694092).

Almost surely, 2^172281064513 is an apocalyptic number.

It is an amenable number.

172281064513 is a deficient number, since it is larger than the sum of its proper divisors (5711855).

172281064513 is an equidigital number, since it uses as much as digits as its factorization.

172281064513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5711854.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 172281064513 in words is "one hundred seventy-two billion, two hundred eighty-one million, sixty-four thousand, five hundred thirteen".