12578772632161 has 4 divisors (see below), whose sum is σ = 12674793797424. Its totient is φ = 12482751466900.

The previous prime is 12578772632159. The next prime is 12578772632233. The reversal of 12578772632161 is 16123627787521.

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 12578772632161 - 2¹ = 12578772632159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12578772632096 and 12578772632105.

It is not an unprimeable number, because it can be changed into a prime (12578772632141) 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, 48010582435 + ... + 48010582696.

It is an arithmetic number, because the mean of its divisors is an integer number (3168698449356).

Almost surely, 2^{12578772632161} is an apocalyptic number.

It is an amenable number.

12578772632161 is a deficient number, since it is larger than the sum of its proper divisors (96021165263).

12578772632161 is an equidigital number, since it uses as much as digits as its factorization.

12578772632161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96021165262.

The product of its digits is 11854080, while the sum is 58.

The spelling of 12578772632161 in words is "twelve trillion, five hundred seventy-eight billion, seven hundred seventy-two million, six hundred thirty-two thousand, one hundred sixty-one".