817649934105 has 64 divisors (see below), whose sum is σ = 1390298038272. Its totient is φ = 409477178880.

The previous prime is 817649934061. The next prime is 817649934107. The reversal of 817649934105 is 501439946718.

It is a happy number.

It is not a de Polignac number, because 817649934105 - 2⁶ = 817649934041 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (817649934107) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5635704 + ... + 5778966.

It is an arithmetic number, because the mean of its divisors is an integer number (21723406848).

Almost surely, 2^817649934105 is an apocalyptic number.

It is an amenable number.

817649934105 is a deficient number, since it is larger than the sum of its proper divisors (572648104167).

817649934105 is a wasteful number, since it uses less digits than its factorization.

817649934105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143598.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 817649934105 in words is "eight hundred seventeen billion, six hundred forty-nine million, nine hundred thirty-four thousand, one hundred five".