813366170161 has 8 divisors (see below), whose sum is σ = 861412111560. Its totient is φ = 765342547968.

The previous prime is 813366170137. The next prime is 813366170231. The reversal of 813366170161 is 161071663318.

It can be written as a sum of positive squares in 4 ways, for example, as 319740487936 + 493625682225 = 565456^2 + 702585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 813366170161 - 2¹³ = 813366161969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (813366170261) 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 7 ways as a sum of consecutive naturals, for example, 5504736 + ... + 5650561.

It is an arithmetic number, because the mean of its divisors is an integer number (107676513945).

Almost surely, 2^813366170161 is an apocalyptic number.

It is an amenable number.

813366170161 is a deficient number, since it is larger than the sum of its proper divisors (48045941399).

813366170161 is a wasteful number, since it uses less digits than its factorization.

813366170161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11159603.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 813366170161 in words is "eight hundred thirteen billion, three hundred sixty-six million, one hundred seventy thousand, one hundred sixty-one".