817406422802 has 6 divisors (see below), whose sum is σ = 1226111552103. Its totient is φ = 408702572102.

The previous prime is 817406422753. The next prime is 817406422823. The reversal of 817406422802 is 208224604718.

It can be written as a sum of positive squares in only one way, i.e., 408703211401 + 408703211401 = 639299^2 + 639299^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=639299.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 958949 + ... + 1598247.

Almost surely, 2^817406422802 is an apocalyptic number.

817406422802 is a deficient number, since it is larger than the sum of its proper divisors (408705129301).

817406422802 is an frugal number, since it uses more digits than its factorization.

817406422802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278600 (or 639301 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 44.

The spelling of 817406422802 in words is "eight hundred seventeen billion, four hundred six million, four hundred twenty-two thousand, eight hundred two".