817325066401 has 4 divisors (see below), whose sum is σ = 817922964672. Its totient is φ = 816727168132.

The previous prime is 817325066387. The next prime is 817325066471. The reversal of 817325066401 is 104660523718.

817325066401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 817325066401 - 2²¹ = 817322969249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (817325066471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298947085 + ... + 298949818.

It is an arithmetic number, because the mean of its divisors is an integer number (204480741168).

Almost surely, 2^817325066401 is an apocalyptic number.

It is an amenable number.

817325066401 is a deficient number, since it is larger than the sum of its proper divisors (597898271).

817325066401 is a wasteful number, since it uses less digits than its factorization.

817325066401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597898270.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 817325066401 in words is "eight hundred seventeen billion, three hundred twenty-five million, sixty-six thousand, four hundred one".