811796519669 has 2 divisors, whose sum is σ = 811796519670. Its totient is φ = 811796519668.

The previous prime is 811796519663. The next prime is 811796519749. The reversal of 811796519669 is 966915697118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 810819207025 + 977312644 = 900455^2 + 31262^2 .

It is a cyclic number.

It is not a de Polignac number, because 811796519669 - 2¹² = 811796515573 is a prime.

It is a super-2 number, since 2×811796519669² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 811796519599 and 811796519608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811796519663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405898259834 + 405898259835.

It is an arithmetic number, because the mean of its divisors is an integer number (405898259835).

Almost surely, 2^811796519669 is an apocalyptic number.

It is an amenable number.

811796519669 is a deficient number, since it is larger than the sum of its proper divisors (1).

811796519669 is an equidigital number, since it uses as much as digits as its factorization.

811796519669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 68.

The spelling of 811796519669 in words is "eight hundred eleven billion, seven hundred ninety-six million, five hundred nineteen thousand, six hundred sixty-nine".