817322037512 has 36 divisors (see below), whose sum is σ = 1551567773535. Its totient is φ = 403632552400.

The previous prime is 817322037437. The next prime is 817322037523. The reversal of 817322037512 is 215730223718.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 408661018756 + 408661018756 = 639266^2 + 639266^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=639266.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 817322037512.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 212234387 + ... + 212238237.

Almost surely, 2^817322037512 is an apocalyptic number.

It is an amenable number.

817322037512 is a deficient number, since it is larger than the sum of its proper divisors (734245736023).

817322037512 is an frugal number, since it uses more digits than its factorization.

817322037512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7874 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 817322037512 in words is "eight hundred seventeen billion, three hundred twenty-two million, thirty-seven thousand, five hundred twelve".