816700529797 has 4 divisors (see below), whose sum is σ = 836620054956. Its totient is φ = 796781004640.

The previous prime is 816700529779. The next prime is 816700529807. The reversal of 816700529797 is 797925007618.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71998842276 + 744701687521 = 268326^2 + 862961^2 .

It is not a de Polignac number, because 816700529797 - 2¹⁵ = 816700497029 is a prime.

It is a super-2 number, since 2×816700529797² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816700509797) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9959762518 + ... + 9959762599.

It is an arithmetic number, because the mean of its divisors is an integer number (209155013739).

Almost surely, 2^816700529797 is an apocalyptic number.

It is an amenable number.

816700529797 is a deficient number, since it is larger than the sum of its proper divisors (19919525159).

816700529797 is a wasteful number, since it uses less digits than its factorization.

816700529797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19919525158.

The product of its (nonzero) digits is 13335840, while the sum is 61.

The spelling of 816700529797 in words is "eight hundred sixteen billion, seven hundred million, five hundred twenty-nine thousand, seven hundred ninety-seven".