11578704161 has 4 divisors (see below), whose sum is σ = 11579254932. Its totient is φ = 11578153392.

The previous prime is 11578704149. The next prime is 11578704191. The reversal of 11578704161 is 16140787511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16140787511 = 9679 ⋅1667609.

It can be written as a sum of positive squares in 2 ways, for example, as 3468621025 + 8110083136 = 58895^2 + 90056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11578704161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11578704191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242546 + ... + 286331.

It is an arithmetic number, because the mean of its divisors is an integer number (2894813733).

Almost surely, 2^11578704161 is an apocalyptic number.

It is an amenable number.

11578704161 is a deficient number, since it is larger than the sum of its proper divisors (550771).

11578704161 is an equidigital number, since it uses as much as digits as its factorization.

11578704161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550770.

The product of its (nonzero) digits is 47040, while the sum is 41.

The spelling of 11578704161 in words is "eleven billion, five hundred seventy-eight million, seven hundred four thousand, one hundred sixty-one".