826163216161 has 4 divisors (see below), whose sum is σ = 826165248192. Its totient is φ = 826161184132.

The previous prime is 826163216117. The next prime is 826163216173. The reversal of 826163216161 is 161612361628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 826163216161 - 2³⁵ = 791803477793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (826163216191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173005 + ... + 1297018.

It is an arithmetic number, because the mean of its divisors is an integer number (206541312048).

Almost surely, 2^826163216161 is an apocalyptic number.

It is an amenable number.

826163216161 is a deficient number, since it is larger than the sum of its proper divisors (2032031).

826163216161 is a wasteful number, since it uses less digits than its factorization.

826163216161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032030.

The product of its digits is 124416, while the sum is 43.

Adding to 826163216161 its reverse (161612361628), we get a palindrome (987775577789).

The spelling of 826163216161 in words is "eight hundred twenty-six billion, one hundred sixty-three million, two hundred sixteen thousand, one hundred sixty-one".